Treasure hunts for 18+ years
Scavenger hunts for adults offer the perfect mix of adventure, mental challenge and social interaction. Whether you are planning a unique date, organising a teambuilding event or just looking for an original activity with friends - our 18+ scavenger hunts combine excitement with relaxation in the great outdoors.
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Made today: speutoch duin in Almere
Available 18+ years treasure hunts (3)
Chasse au trésor dans Ennetières !
Avelin, Hauts-de-France, France
Répondez aux questions !
Dieren
18+ year
Fun in het Noorderplantsoen
Groningen, Groningen, Netherlands
Doe deze speurtocht en ontdek het Noorderplantsoen in Groningen. Succes!
Biologie
18+ year
Fortuna Sittard Cultuur door Sittard
Sittard, Limburg, Netherlands
Ontdek de diepgewortelde voetbalcultuur van Fortuna Sittard in de stad Sittard. Van het stadion naar de supporterskroeg…
Voetbal
18+ year
Featured this week: example questions for 18+ years
New example questions from the library every Monday. Updated on 5 October 2026.
How many different colours can birds distinguish?
More than people (including UV)
Less than people
Same as people
Black and white only
Which bird has the most developed olfactory instructions?
Kiwi
Condor
Albatross
Vulture
Which tree has the widest trunk in the world?
Baobab
Oak
Sequoia
Cedar
Which form of energy has the lowest CO2 emissions per kilowatt hour?
Nuclear energy
Wind energy
Solar
Hydropower
In which cells of C4 plants does the Calvin cycle take place?
Bundle-shaped separator cells
Mesophyll cells
Epidermis cells
Stomata
What phenomenon causes the characteristic white colour of clouds?
Mie scattering by water droplets
Rayleigh scattering
Total reflection
Light absorption
What is the name of the phenomenon where cold air slides under warm air?
Cold front
Heat front
Occlusion
Squall line
Which mammal species is a true wetland specialist and builds dams?
Beaver
Otter
Muskrat
Water shrew
What is 'mobbing behaviour' in birds?
Jointly attacking predators
Driving conspecifics out of territory
Stealing food from other birds
Disturbing breeding pairs
Which crocodile has the most advanced communication?
American alligator
Nile crocodile
Saltwater crocodile
Gavial
What is the scientific name for sheep?
Ovis aries
Capra hircus
Forest taurus
Sus scrofa
On average, how many different fruits does a toucan eat per day?
15-20 species
5-8 species
30-40 species
2-3 species
What special feature do the wings of the Glasswing butterfly have?
They are transparent
They change colour
They are magnetic
They glow in the dark
Which butterfly is considered a symbol of the warrior soul in Japan?
Monarch butterfly
Swallowtail butterfly
Cabbage White butterfly
Copper butterfly
How many pairs of ribs does a guinea pig have?
13
12
14
11
Which animal has the largest pupils?
Colossal squid
Blue whale
Elephant
Giant squid
Which Dutch city was bombed by the Germans on 14 May 1940?
Rotterdam
Amsterdam
The Hague
Utrecht
What was the name of the hall where fallen warriors were received in Asgard?
Valhalla
Fólkvangr
Gladsheim
Vingólf
What was Columbus' original destination on his maiden voyage in 1492?
The East Indies (Asia)
A new western continent
Africa's gold-rich countries
Indonesia's spice islands
What revolutionary institution replaced the old parliaments?
The National Assembly
The States General
The Directoire
The Senate
Which emperor introduced the tetrarchy as a system of governance?
Diocletian
Maximian
Galerius
Constantius Chlorus
Which animal symbolised wisdom in Nordic mythology and belonged to Odin?
Raven
Wolf
Eagle
Bear
In which city was the peace signed that ended the US War of Independence?
Paris
London
Versailles
The Hague
Which inventor developed the first working system for stereoscopic photography?
David Brewster
Charles Wheatstone
Oliver Wendell Holmes
Louis Daguerre
Which Dutch gymnast won Olympic silver on beam in 2016?
Sanne Wevers
Verona van de Leur
Sanne Wevers won gold, not silver
Eythora Thorsdottir
What is the origin of the Dutch word 'bamboo'?
Chinese
Malay
Japanese
Vietnamese
On average, how many blows per minute does a wind turbine turn?
20-40 beats per minute
60-80 beats per minute
10-15 beats per minute
45-60 beats per minute
Which politician was the first to return as prime minister after a previous term in office?
Hendrikus Colijn
Willem Drees
Abraham Kuyper
Dirk Jan de Geer
Which Dutch cheese was named 'Best Cheese in the World' at the World Championship Cheese Contest in 2010?
Farmer-Leiden with keys
North Holland Gouda
Limburger cheese
Frisian nail cheese
What traditional game is played during Sinterklaas celebrations?
Dice game with packages
Pete hiding
Sinterklaas memory
Package guessing
Which party first advocated the abolition of the Senate?
D66
SP
Labour Party
VVD
What is the name of the palace that serves as the king's working palace?
Noordeinde Palace
Huis ten Bosch Palace
Royal Palace Amsterdam
Paleis Het Loo
Which tennis player played the longest match ever at Wimbledon in 2010?
John Isner and Nicolas Mahut
Kevin Anderson and John Isner
Novak Djokovic and Rafael Nadal
Andy Murray and Juan Martin del Potro
What is the official circumference of a men's handball?
58-60 cm
54-56 cm
62-64 cm
50-52 cm
Which MMA organisation is known as the greatest in the world?
UFC (Ultimate Fighting Championship)
Bellator MMA
ONE Championship
PFL (Professional Fighters League)
In which year did snowboarding become an Olympic sport for the first time?
1998
1994
2002
1992
What is the minimum distance that players must keep at a free kick?
9.15 metres
10 metres
9 metres
8.5 metres
In which sport is the 'Perfect Game' considered the highest achievement?
Baseball
Basketball
Bowling
Darts
What is beach volleyball's main difference from indoor volleyball in terms of number of players?
2 players per team instead of 6
4 players per team instead of 6
5 players per team instead of 6
3 players per team instead of 6
Which wakeboard trick involves the rider making a full rotation while holding the board?
Tantrum
Raley
Roll to revert
Scarecrow
At which club did Kaká make his professional debut?
São Paulo
AC Milan
Real Madrid
Flamengo
Which country hosted the 1976 European Championship?
Yugoslavia
Italy
Belgium
Netherlands
When is a hands violation NOT punishable for a fielder?
If the ball is shot from a very short distance
If the player has turned his back to the ball
If the ball comes from a teammate
If the player is on the ground
From which age group are yellow and red cards officially registered by the KNVB?
JO13
JO15
JO11
JO17
Which referee conducted the 2006 World Cup final?
Horacio Elizondo
Pierluigi Collina
Howard Webb
Markus Merk
Which club is known as 'Die Werkself'?
Bayer Leverkusen
VfL Wolfsburg
TSG Hoffenheim
FC Augsburg
Who was Barcelona's coach during their historic 6-1 comeback against PSG in 2017?
Luis Enrique
Pep Guardiola
Ronald Koeman
Ernesto Valverde
Under which coach did Liverpool win the Champions League in 2005 after the comeback against AC Milan?
Rafael Benítez
Gérard Houllier
Roy Evans
Jürgen Klopp
Which city is the capital of Tasmania?
Hobart
Launceston
Devonport
Burnie
Which city is also called 'The Pearl of Siberia' because of its location on Lake Baikal?
Irkutsk
Novosibirsk
Chita
Oelan-Oede
Lake Baikal contains about what percentage of all the world's fresh surface water?
20%
15%
30%
10%
Which desert is home to the largest population of wild camels?
Great Western Desert (Australia)
Gobi
Taklamakan
Karakum
Which city is also called 'The Windy City'?
Chicago
Boston
San Francisco
Seattle
Which city is home to the famous Taj Mahal?
Agra
Delhi
Jaipur
Lucknow
Which lake in Scotland is known for its legendary monster?
Loch Ness
Loch Katrine
Loch Lomond
Loch Tay
Which flag is the only one that has an axe and hammer on it?
Angola
Vietnam
North Korea
China
Which Dutch cheese town has the oldest cheese museum?
Alkmaar
Edam
Gouda
Horn
How many different champagne styles are officially recognised for festive occasions?
7
5
9
12
What is the optimal pH for meat after maturing?
5.4-5.6
6.0-6.2
5.8-6.0
5.0-5.2
What does 'en croûte' mean in patisserie?
In a dough crust
With sugar crust
With chocolate coating
In the form
What test is used to diagnose lactose intolerance?
Hydrogen breath test
Blood sugar test
Skin prick test
Saliva test
What is the function of lecithin in chocolate?
Emulsifier for better texture
Sweetener as a sugar substitute
Preservative
Dye for golden brown shade
Which herb is essential for preparing traditional pesto Genovese?
Basil Genovese
Parsley
Arugula
Oregano
In which period are mussels traditionally harvested according to the Dutch proverb?
Months with an R
Months without R
Summer months only
All year round
What is the name of the criminal organisation run by Wilson Fisk?
The Maggia
The Hand
Hydra
AIM
Which Dutch superhero was originally written by Evert Werkman?
Captain Rob
Storm
Agent 327
The Red Knight
Which superhero is nicknamed 'The Emerald Archer'?
Green Arrow
Hawkman
Arsenal
Speedy
What nickname did the grey-haired version of the Hulk get when he worked as a bodyguard in Las Vegas?
Joe Fixit
Grey Ghost
Mr. Fix
Vegas Hulk
What is the term for the ability to absorb life energy?
Vital absorption
Bio-vampirism
Energy drain
Life force transfer
In which dimension did Iron Man travel during the storyline 'Doomwar'?
Negative Zone
Dark Dimension
Quantum Realm
Mirror Dimension
What is called the power to shape and manipulate metals?
Ferrokinese
Magnetokinesis
Metallokinesis
Siderokinesis
What is the name of the clone of Peter Parker who later became Scarlet Spider?
Ben Reilly
Kaine Parker
Miles Warren
Michael Morbius
Which molecule transports oxygen in the blood of mammals?
Haemoglobin
Myoglobin
Cytochrome
Transferrin
Which bacterium is most commonly used for plant transformation?
Agrobacterium tumefaciens
Escherichia coli
Bacillus thuringiensis
Rhizobium leguminosarum
What process form does the cell use to bring in large molecules?
Endocytosis
Diffusion
Osmosis
Active transport
What is the role of bacteriophages in nature?
Control of bacterial populations
Production of oxygen
Decomposition of dead organic matter
Stitching
What structure protects the developing embryo in reptiles?
Amnion
Placenta
Chorion
Yolk sac
What is the primary function of the contractile vacuole in paramecia?
Water regulation and osmoregulation
Food digestion
Propulsion
Oxygen Storage
Which tree can become the oldest in the world?
Pinus longaeva (Bristlecone Pine)
Sequoiadendron giganteum
Taxus baccata
Quercus robur
Which species of animal has the largest brain of all animals?
Sperm whale
Blue whale
Elephant
Orca
Which director won an Oscar for 'Birdman' and also directed 'The Revenant'?
Alejandro González Iñárritu
Alfonso Cuarón
Guillermo del Toro
Denis Villeneuve
Which Pixar film was the first to win an Academy Award for Best Animated Feature?
Monsters, Inc.
Toy Story
A Bug's Life
Toy Story 2
Which animation technique was used for the film 'The Nightmare Before Christmas'?
Stop-motion
Traditional cell animation
3D computer animation
Rotoscoping
Which fantasy film contains the statement "You shall not pass!"?
The Lord of the Rings: The Fellowship of the Ring
The Hobbit: An Unexpected Journey
The Chronicles of Narnia
Harry Potter and the Philosopher's Stone
What is the Winter Soldier's real name?
James Buchanan Barnes
Samuel Thomas Wilson
Timothy Aloysius Dugan
Gabriel Jones
Which film is considered the first slasher film?
Psycho (1960)
Peeping Tom (1960)
Halloween (1978)
Black Christmas (1974)
In which film do we first see the Disney princesses Rapunzel and Flynn Rider together in a cameo?
Frozen
Moana
Big Hero 6
Wreck-It Ralph
In Shrek, who lends their voice to the Donkey?
Eddie Murphy
Chris Rock
Mike Myers
Cameron Diaz
Which architectural movement introduced the concept of 'form follows function' and was characterised by the omission of unnecessary decoration?
Functionalism
Art Nouveau
Neoclassicism
Brutalism
The Museum of Modern Art (MoMA) was founded in which year?
1929
1935
1923
1941
Which art movement is characterised by the use of tiny dots of colour that blend optically?
Pointillism
Impressionism
Expressionism
Fauvism
Which Dutch animated film won an Academy Award?
The Dot (The Dot)
The Secret of the Saber Cat
Minoes
Frog and the Stranger
Which Dutch art movement was founded by Theo van Doesburg and Piet Mondrian around 1917?
The Style
Cobra
New Objectivity
Realism
By which artist is the famous fresco in the Sistine Chapel?
Michelangelo Buonarroti
Raffaello Sanzio (Raphael)
Leonardo da Vinci
Sandro Botticelli
What is the hallmark of a 'suite' in graphic art?
A series of prints that belong together thematically
A deluxe version of a single print
A print printed on silk
A combination of different techniques
What is 'assemblage' in the context of modern sculpture?
Composing sculptures from different objects
Working stone with pneumatic tools
Melting different types of metal
Stacking identical elements
What is the temperature of the cosmic background radiation?
2.7 Kelvin
3.5 Kelvin
1.4 Kelvin
5.2 Kelvin
In which archaeological site in Turkey were the oldest known stone temples found?
Göbekli Tepe
Çatalhöyük
Troy
Pergamon
Which invention by Art Fry in 1974 was inspired by a weakly adhesive glue by his colleague?
Post-it notes
Masking tape
Duct tape
Scotch tape
What test is used to distinguish blood from other red liquids?
Kastle-Meyer test
Benedict test
Biuret test
Fehling test
What technique is used to analyse the chemical composition of paint?
X-ray fluorescence spectroscopy
Mass spectrometry alone
Chromatography alone
Electrophoresis
Which scientist conducted the first controlled experiment on smallpox vaccination?
Edward Jenner
Louis Pasteur
Robert Koch
Ignaz Semmelweis
What material did Percy Spencer accidentally use to discover the microwave oven led to its invention?
A chocolate bar
A sandwich
Popcorn
An apple
Which mathematical theorem asserts that there are no three positive integers a, b and c that satisfy a^n + b^n = c^n for n > 2?
Fermat's last theorem
The Pythagorean theorem
Goldbach's theorem
Riemann's theorem
What is a neopolitan accord?
A major chord built on the lowered second step
A minor chord with an augmented fifth
A diminished chord on the seventh step
An excessive chord on the third stage
Which Swedish group won the Song Contest with 'Waterloo' in 1974?
ABBA
Roxette
Ace of Base
Army of Lovers
How many lines does a standard stave have?
5 lines
4 lines
6 lines
7 lines
Which composer wrote the famous 1867 'Stabat Mater' for choir and orchestra?
Gioachino Rossini
Giuseppe Verdi
Gaetano Donizetti
Vincenzo Bellini
Which accordion type is commonly used in Argentine tango?
Bandoneon
Diatonic accordion
Piano accordion
Button accordion
Which city is considered the birthplace of trap music?
Atlanta
Memphis
New Orleans
Houston
What was the original name of the band that later became known as Shocking Blue?
The Motions
The Outsiders
The Hunters
The Rocking Strings
Which pianist and composer is considered the greatest virtuoso of the Romantic era?
Franz Liszt
Frédéric Chopin
Robert Schumann
Felix Mendelssohn
The best antonym for 'munificent' is:
stingy
unfriendly
insecure
unreliable
What form does 'sleep' have in 'They slept deeply'?
Incomplete past tense
Completed past tense
Incomplete present tense
Completed present tense
In which composition does the first part act as direct object?
mouse catcher
mousetrap
mouse hole
mouse infestation
What is the name of the punctuation mark used to separate a syllable in dictionaries?
Torque mark
Item
Vertical stripe
Space
How many syllables does the word 'knees' have?
2
1
3
4
What is a synonym for 'mendacity'?
mendacity
stinginess
inertia
indifference
What function does a cedilla have under a letter?
Softening pronunciation
Indicate accent
Nasal sound marking
Indicate extension
What is the correct spelling of 'someone engaged in philosophy'?
philosopher
philosopher
philosooph
philosopher
Which ESA mission is currently studying the sun up close?
Solar Orbiter
SOHO
Ulysses
Cluster
Which planetary defence mission is being led by ESA?
Hera
DART
OSIRIS-REx
Lucy
What is the name of ESA's new generation of astronaut class selected in 2022?
ESA Astronaut Class 2022
Artemis Generation
New Space Explorers
European Space Pioneers
What is the typical burn time of the first stage of a Falcon 9?
About 2.5 minutes
About 6 minutes
About 1 minute
About 4 minutes
What innovation made it possible to significantly improve finger dexterity in space gloves?
Use of flexible silicones
TMG (Thermal Micrometeoroid Garment) layers
Phase VI gloves with rolling convolute joints
Magnetic articulation systems
Which planet has the heaviest surface gravity?
Jupiter
Saturn
Neptune
Uranus
Which theory best describes the behaviour of matter and energy around black holes?
General theory of relativity
Special theory of relativity
Newtonian mechanics
Quantum mechanics
How many scientific instruments does the James Webb Space Telescope carry?
4
6
8
10
What does the abbreviation TÜV mean in German car testing?
Technischer Überwachungsverein
Transport Überwachung Verfahren
Technische Universelle Vorschrift
Title Überprüfungs Verordnung
What technology is used to improve the aerodynamics of modern trains?
Streamlined nose and tail
Higher driving speed
Wider wagons
Lighter materials
Which motorway runs along the North Sea coast from The Hague to Bergen op Zoom?
A4
A13
A20
A17
Which principle explains why an aircraft wing generates lift?
Bernoulli's principle and Newton's third law
Only the principle of Archimedes
The Magnus effect
The Venturi effect alone
What percentage of body surface area is the 'rule of 9' for a leg in adults?
18%
9%
27%
12%
What shape is the 'STOP' road sign?
Octagonal
Round
Triangular
Square
Which city has the world's first "smart" pedestrian tunnel with interactive lighting?
Seoul
Tokyo
Singapore
Amsterdam
What is the difference between a hybrid bike and a trekking bike?
Hybrid bikes are a mix of road and mountain bike features
Trekking bikes have more gears
Hybrid bikes have dicier tyres
There is no difference
What is the result of 7890 + 1234 + 5678?
14802
14792
14812
14902
How much is 15% of 240?
36
30
42
24
How many degrees does the hour hand shift in 7 minutes?
3.5 degrees
2.8 degrees
4.2 degrees
5.0 degrees
How much is 11 × 12 - 13?
119
125
113
121
What is 98765 - 56789?
41976
41986
41966
41876
A rectangle has an area of 84 cm² and a perimeter of 38 cm. What is the length of the longest side?
12 cm
14 cm
10 cm
21 cm
An architect's plan has scale 1:50. A room is 8 cm wide on the plan. How many metres wide is the actual room?
4 metres
1.6 metres
6.25 metres
2.5 metres
What is the result of 20² - 19²?
39
1
40
38
Which computer was the first to use parallel processing?
ILLIAC IV
CDC 6600
Cray-1
Connection Machine
What protocol is used for synchronising time across networks?
NTP
SMTP
SNMP
DHCP
Which protocol provides end-to-end encryption for instant messaging?
Signal protocol
XMPP
IRC
MQTT
Which programming language is known for the concept of 'everything is an object'?
Ruby
Java
C#
Python
Which NoSQL database is commonly used for time series data and was developed by InfluxData?
InfluxDB
TimescaleDB
Prometheus
OpenTSDB
Which game is considered the first commercial real-time strategy (RTS) game?
Herzog Zwei
Dune II
Command & Conquer
Warcraft
What is a 'troll' on social media?
Someone who deliberately provokes or disturbs
A type of bone
A privacy setting
A kind of emoji
What algorithm is used for finding Strongly Connected Components?
Kosaraju's algorithm
Dijkstra's algorithm
Prim's algorithm
Kruskal's algorithm
How much energy does the sun produce per second?
3.8 × 10²⁶ joules
1.4 × 10²³ joules
5.2 × 10²⁹ joules
2.1 × 10²⁵ joules
Which isotope is created by neutron capture by U-238?
Neptunium-239
Plutonium-239
Uranium-239
Protactinium-239
What is the relationship between electric field and electric potential?
The electric field is the negative gradient of the potential
The electric field is equal to the potential
The electric field is the integral of the potential
The electric field is the square root of the potential
Which law describes the relationship between tension and pressure in a sphere?
Laplace's law
Hooke's law
Young's law
Poisson's law
Which physicist discovered the law describing that the current through a conductor is proportional to the voltage?
Georg Ohm
Alessandro Volta
André-Marie Ampère
James Clerk Maxwell
What causes the geysers on the moon Enceladus?
Sublimation of ice due to low atmospheric pressure
Volcanic activity
Solar winds
Magnetic field changes
What is the Curie temperature?
Temperature at which ferromagnetism disappears
Melting point of iron
Temperature of absolute zero
Boiling point of water
On average, how much energy does the human heart muscle produce per day?
Approximately 8400 joules
About 2100 joules
Approximately 16800 joules
Approximately 4200 joules
What is the sal effect in solubility?
Change in solubility by addition of an inert salt
Crystallisation of salts
pH change due to salts
Colour change due to salts
What is the cetane value of normal hexadecane?
100
87
50
At what temperature does the Haber-Bosch reaction take place optimally?
450-500°C
200-250°C
650-700°C
100-150°C
What effect occurs when a gas flows through a small opening?
Graham's diffusion effect
Joule-Thomson effect
Doppler effect
Venturi effect
What is the pH of a polyprotic acid solution mainly determined by?
The first ionisation step
The final ionisation step
The average of all ionisation steps
The strongest ionisation step
What is the name for the point at which the three aggregate states are in equilibrium?
Tripel Point
Critical point
Equilibrium point
Phase transition point
What is the compression factor (Z) for an ideal gas?
1
∞
R (gas constant)
Which electronic transition is responsible for the colour of permanganate ions?
Charge transfer between Mn and O
d-d transition into manganese
p-p transition in oxygen
s-p hybridisation
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Frequently asked questions
Absolutely not! Our 18+ treasure hunts contain complex puzzles, strategic challenges and adult themes. They are specially designed to challenge even experienced puzzlers.
Most treasure hunts are suitable for 2-8 people per team. Larger groups can be split into several teams for fun competition among themselves.
Adult treasure hunts usually last between 1.5 and 3 hours, depending on the complexity and pace of your team. You determine the pace yourself.
Sure! Treasure hunts are excellent team-building activities. They promote cooperation, communication and problem-solving skills in a relaxed setting.
Scavenger hunts are great date ideas! Solving puzzles and having adventures together creates unique memories and lets you see each other from a different side.
A treasure hunt for 18+ years is a GPS walk with questions specially tailored to this level. The questions are fun, educational and appropriate for the age group.
On average, a scavenger hunt takes 45 to 90 minutes, depending on the number of locations and walking distance. Ideal for an afternoon out.
Yes, the questions are educational and tailored to the level of knowledge. Children learn while moving outdoors and having fun.