Treasure hunt 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.
Step 1 of 3
Free, so it costs you nothing! Really!
Made 2 days ago: Enkhuizen city walk in Enkhuizen
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 12 October 2026.
Which pollutant is primarily produced by diesel engines?
Particulate matter (PM10/PM2.5)
Carbon monoxide (CO)
Methane (CH₄)
Ammonia (NH₃)
What substance does a skunk produce as a defence?
Mercaptans
Ammonia
Hydrogen sulphide
Formaldehyde
What chemical compound is used by corals for skeletonisation?
Aragonite
Calcite
Dolomite
Plaster
Which mushroom is used to produce quorn (meat substitutes)?
Fusarium venenatum
Pleurotus ostreatus
Agaricus bisporus
Rhizopus oligosporus
Which amphibian can shed its skin completely during reproduction?
Crested newt
Common toad
Brown frog
Small newt
In which cells of C4 plants does the Calvin cycle take place?
Bundle-shaped separator cells
Mesophyll cells
Epidermis cells
Stomata
Which characteristic distinguishes ink mushrooms (Coprinus) from other mushrooms?
Their plates dissolve into a black liquid
They only grow at night
They change colour when touched
They produce a strong odour
Which mushroom is known for its bioluminescence (giving off light)?
Armillaria mellea
Pleurotus ostreatus
Lentinula edodes
Agaricus campestris
What defence strategy does the caterpillar of the Arrow-tailed butterfly use?
Blowing up and showing eye spots
Keeping oneself dead
Running away hard
Separating ink colours
Which plant is used by the caterpillar of the swallowtail butterfly?
Carrots and other umbelliferous plants
Nettle
Cabbage
Willow
How many toes does a chicken have?
4
3
5
2
Which animals exhibit 'sentinel behaviour' in groups?
Meerkats
Prairie Dogs
Marmots
Hamsters
How many litres of water can an elephant hold with its trunk?
8 litres
20 litres
3 litres
15 litres
Which goose species is the heaviest?
Toulouse goose
Greylag goose
Embden goose
Chinese goose
What is the average gestation period of a mare?
11 months
9 months
10 months
12 months
What is special about the life cycle of a cicada?
Live underground for 17 years before emerging
Live only 24 hours as an adult insect
Change shape 10 times
Wintering in tree cavities
Which city was founded by Vikings and is now the capital of Russia?
Moscow was NOT founded by Vikings
Moscow was founded by Rurik
Moscow was founded by Oleg of Novgorod
Moscow was founded by Igor of Kiev
Which Ottoman battle in 1915-1916 became a disastrous defeat for the allies?
Gallipoli campaign
Battle of Gaza
Siege of Pussy
Battle of Megiddo
Which Lewis and Clark expedition started from which river in 1804?
Missouri
Mississippi
Ohio
Columbia
Which color did the royalist rebels in the Vendée wear as a means of identification?
White
Blue
Black
Gold
Which Venetian painter was known for his use of colour and is called the 'King of Painters'?
Tiziano Vecellio
Tintoretto
Paolo Veronese
Giorgione
Which Finnish general led the defence during the Winter War against the Soviet Union?
Carl Gustaf Emil Mannerheim
Aksel Airo
Hugo Österman
Erik Heinrichs
Which US president had to resign because of the Watergate scandal?
Richard Nixon
Gerald Ford
Jimmy Carter
Lyndon Johnson
In which year was the Dutch constitution first revised according to democratic principles?
1848
1815
1853
1840
How many different varieties of tulips are planted at the Keukenhof every year?
About 800
About 1,200
About 500
About 1,500
What is the name of the river that flows through Utrecht?
The river Vecht
The Kromme Rijn
The Merwede Canal
The Lek
In which city is the famous Loevestein Castle located?
Poederoijen
Woudrichem
Gorinchem
Zaltbommel
What is the name of St Nicholas' traditional steamer?
Pakjesboot 12
Saint boat 1
Gift ship
The Good Lord
Which Dutch river is also called 'De Gele'?
The Waal
The Meuse
The river IJssel
The Lek
Approximately how many different mill types does the Netherlands have?
More than 30
About 15
About 25
About 12
Which Dutch dairy produces 'Old Amsterdam' cheese?
Westland Cheese
FrieslandCampina
DOC Cheese
Cono cheese makers
What percentage of global exports of flower bulbs come from the Netherlands?
About 60%
About 45%
About 75%
About 35%
Which tennis player held the No. 1 position in the ATP rankings for the longest?
Novak Djokovic
Roger Federer
Pete Sampras
Ivan Lendl
Which tennis player is known for his two-handed forehand as well as backhand?
Marion Bartoli
Chris Evert
Monica Seles
Björn Borg
Which Dutch athlete won the marathon at the 1928 Olympics in Amsterdam?
Boughera El Ouafi
Gerard Bosch van Drakestein
No Dutch athlete won
Henk den Ouden
In which city did the first modern Olympics take place where gymnastics was a feature?
Athens
Paris
London
St. Louis
Which driver took his only F1 victory in the 1995 Canadian Grand Prix?
Jean Alesi
Gerhard Berger
Eddie Irvine
David Coulthard
Which Dutch swimmer won Olympic gold in the 10km open water swimming?
Maarten van der Weijden
Ferry Weertman
Thomas Lurz
Pieter van den Hoogenband
How many teams participate in the highest Dutch men's hockey competition?
12
10
14
16
Which club has won the most UEFA Champions League/Europacup I titles?
Real Madrid
AC Milan
Liverpool
Bayern Munich
From which age group are yellow and red cards officially registered by the KNVB?
JO13
JO15
JO11
JO17
Which manager has managed the most Premier League matches?
Arsène Wenger
Sir Alex Ferguson
Harry Redknapp
David Moyes
In which season did Real Madrid last get relegated from La Liga?
Never
1936-37
1940-41
1953-54
What is the minimum number of minutes a football match must last to be valid according to FIFA rules?
70 minutes
60 minutes
75 minutes
65 minutes
Which player scored the winning goal in the 1982 World Cup final?
There was no 1982 World Cup final with a winning goal
Paolo Rossi
Marco Tardelli
Alessandro Altobelli
What is the minimum age for a youth football referee to whistle matches?
14 years
16 years
12 years
15 years
What is the primary function of a 'false nine' in modern football?
Dropping to midfield to create space
Constantly staying in the sixteen for header chances
Rounding counters only
Leading the defence from a deeper position
In which year did Zinedine Zidane make his famous headbutt against Marco Materazzi during the World Cup final?
2006
2004
2008
2002
Which city is the capital of the Faroe Islands?
Tórshavn
Klaksvík
Runavík
Vágar
Which Asian desert is characterised by extreme temperature variations between summer and winter?
Gobi
Taklamakan
Karakum
Dasht-e Kavir
Which mountain range stretches from Morocco to Tunisia?
Atlas Mountains
Rif
Ahaggar
Tibesti
What is the capital of South Sudan?
Juba
Malakal
Wau
Bentiu
What does a benchmark (triangle point) on a topographic map indicate?
A precisely measured high point
A water tower
A military installation
A weather station
Which steppe stretches across parts of Mongolia and China?
Gobi Desert
Takla Makan
Karakum
Kyzylkum
What is the scientific name for the star formation that occurs when wind blows sand around an obstacle?
Barchan
Serir
Hamada
Yardang
At what altitude does the 'death zone' officially begin in high mountains?
8000 meters
7500 meters
8500 meters
7000 meters
In what period do strawberries have their natural outdoor season in the Netherlands?
June-July
March-April
September-October
November-December
What test is used to diagnose celiac disease?
Intestinal biopsy
Skin prick test
Breath test
Urine analysis
From which plant is the spice ajwain extracted?
Trachyspermum ammi
Carum carvi
Cuminum cyminum
Nigella sativa
What should be the minimum percentage of cocoa in dark chocolate according to EU legislation?
43%
35%
50%
60%
Which bread is traditionally baked in sand ovens?
Bedouin bread from the Sahara
Hawaiian bread
Australian damper
Mexican bolillo
What does 'en croûte' mean in patisserie?
In a dough crust
With sugar crust
With chocolate coating
In the form
What is the ideal humidity for storing chocolate?
50-55%
70-75%
30-35%
85-90%
What is the origin of the macaron?
Italy (via Catherine de Medici to France)
France (Loire Valley)
Spain (Andalusia)
Austria (Vienna)
What is the real name of the Marvel villain Venom?
Eddie Brock
Cletus Kasady
Mac Gargan
Flash Thompson
What is the superpower called to slow down time?
Time dilation
Chronostasis
Temporal reduction
Time compression
Which actor played Aquaman in the DC Extended Universe films?
Jason Momoa
Chris Hemsworth
Michael Shannon
Patrick Wilson
Which Marvel superhero has the alter ego Carol Danvers?
Captain Marvel
Ms Marvel
Warbird
Binary
In what time period did Booster Gold get its powers?
25th century
31st century
30th century
24th century
Which DC superhero was the first to officially die and actually stay dead for more than 20 years?
The Flash (Barry Allen)
Superman
Green Lantern (Hal Jordan)
Robin (Jason Todd)
What is the name of the newspaper where Clark Kent first worked for Daily Planet?
Smallville Ledger
Smallville Gazette
Smallville Herald
Smallville Times
What is the name of Green Arrow's hometown?
Star City
Central City
Coast City
Hub City
What is the botanical name for the common dandelion?
Taraxacum officinale
Bellis perennis
Leucanthemum vulgare
Matricaria chamomilla
Which hormone increases breathing frequency during stress?
Adrenaline
Insulin
Cortisol
Thyroxine
What causes the disease malaria?
Plasmodium parasites
Trypanosoma parasites
Leishmania parasites
Babesia parasites
Which blood clotting cascade is activated by tissue damage?
Extrinsic cascade
Intrinsic cascade
Fibrinolytic cascade
Complement cascade
What happens during the lytic cycle of viruses?
The host cell is destroyed
The virus becomes inactive
DNA integrates into the chromosome
The cell becomes resistant
What are tyloses in wood cells?
Blockage of vessels by parenchymal cells
Growth rings in the wood
Wood fibres for strength
Nutrients in wood
Which molecule binds to the same site on haemoglobin as oxygen?
Carbon monoxide
Carbon dioxide
Nitrogen
Water vapour
What is thigmotropism?
Growth response to touch
Growth response to light
Growth response to gravity
Growth response to water
Which Disney film contains the song 'A Spoonful of Sugar'?
Mary Poppins
The Sound of Music
Chitty Chitty Bang Bang
Bedknobs and Broomsticks
Which actor plays Boromir in Lord of the Rings?
Sean Bean
Viggo Mortensen
Orlando Bloom
John Rhys-Davies
Which superheroine can stretch in The Incredibles?
Elastigirl
Violet
Mirage
Edna Mode
In 'The Secret of NIMH' what kind of animals are the main characters?
Mice and rats
Rabbits and foxes
Cats and dogs
Birds and squirrels
Which 2015 action film was filmed entirely in one long take?
Victoria
Mad Max: Fury Road
The Revenant
Sicario
In Captain Marvel, what are the names of the alien warriors Carol Danvers fights for?
Kree
Skrull
Chitauri
Badoon
In 2009's 'Coraline', what does the 'Other Mother' have instead of eyes?
Buttons
Mirrors
Black holes
Diamond
In Ratatouille, what is the name of the strict food critic?
Anton Ego
Auguste Gusteau
Alfredo Linguini
Chief Skinner
Which sculptor created the monumental sculpture 'Angel of the North'?
Antony Gormley
Henry Moore
Barbara Hepworth
Rachel Whiteread
Which artist is considered a pioneer of 'Environment' art in the 1950s?
Allan Kaprow
Claes Oldenburg
Jim Dine
Robert Rauschenberg
What is the function of a 'corbel' in traditional architecture?
A protruding stone or log carrying weight
A decorative border around windows
One type of flooring
A water drainage system
Which designer is known for his iconic red soles on women's shoes?
Christian Louboutin
Jimmy Choo
Manolo Blahnik
Giuseppe Zanotti
Which art movement used 'assemblage' as its main technique?
Nouveau Réalisme
Supports/Surfaces
Figuration Narrative
École de Nice
What is the principle on which lithography is based?
The repulsion between fat and water
Etching metal with acid
Cutting in wood along the grain
Pressing paper into tiers
Which artist is famous for his 'Campbell's Soup Cans'?
Andy Warhol
Roy Lichtenstein
Jackson Pollock
Keith Haring
What characterises the sculpture of Minimalism?
Geometric simplicity and industrial materials
Emotional expressiveness
Decorative details
Natural organic forms
Which atmospheric layer contains the most water vapour?
Troposphere
Stratosphere
Mesosphere
Thermosphere
At what atmospheric condition do mammatus clouds form?
Strong downward air currents
High humidity
Temperature inversion
Low air pressure
What substance is used in the Griess test for nitrite detection in gunshot wounds?
Sulfanilic acid and alpha-naphthol
Ninhydrin and zinc chloride
Luminol and hydrogen peroxide
Phenolphthalein and ethanol
What disease is also known as 'Parkinson's disease'?
A neurodegenerative disorder
An autoimmune disease
A cardiovascular condition
A genetic metabolic disease
Which Josephine Cochrane's 1886 invention was initially used only in hotels?
Dishwasher
Washing machine
Hoover
Coffee maker
Which plant did Barbara McClintock use for her pioneering genetic experiments on jumping genes?
Corn
Peas
Fruit flies
Tobacco plants
What is the name of the phase transition in which a solid changes directly to gaseous form?
Sublimation
Evaporation
Condensation
Deposition
Which scientist discovered the laws of planetary motion?
Johannes Kepler
Tycho Brahe
Nicolaus Copernicus
Galileo Galilei
The Indonesian gamelan is traditionally tuned according to which tuning system?
Slendro and Pelog
Pentatonic
Chromatic
Diatonic
Which famous male choir is from Wales?
Treorchy Male Choir
King's College Choir
Westminster Abbey Choir
Mormon Tabernacle Choir
How many different triads can be formed within a major scale?
7
8
6
12
What is the traditional method of manufacturing cello tops?
Cut from one piece of pine
Gluing two pieces of maple
Pressed laminated veneer
Hollowing out solid oak
How many keys does a standard harmonium have?
Typically ranges between 36-61 keys
Always 88 like a piano
Standard 32 keys
76 keys only
Which Turkish music style combines classical Ottoman music with modern arrangements?
Türk Sanat Müziği
Arabesque
Halk Müziği
Fasıl
What is an erhu?
A Chinese violin with two strings
A Japanese bamboo flute
A Korean drum
A Vietnamese zither
What material is traditionally used for the black keys of a piano?
Ebony
Rosewood
Wenge
Black lacquered maple
Which diminutive is used for a short walk?
stroll
run
step
round
Which Dutch poet was famous for his sonnets in the 17th century?
P.C. Hooft
Jan Luyken
Constantijn Huygens
Jacob Cats
What form of viewpoint shift is 'People say he is sick'?
Impersonal construction
Passive construction
Reflexive construction
Reciproke construction
What does 'palimpsest' mean?
A reused writing material with visible old text
A collection of poems
An ancient measuring instrument
A kind of old map
What is a paronomasia?
Playing with homonymous or similar words
Repeating the same sentence structure
Using obsolete words
Combining different languages in one sentence
In which musical notation are punctuation mark-like symbols used for pauses?
Western music notation
Byzantine music notation
Indian raga notation
Chinese music notation
Which auxiliary verb belongs to 'leave' in the past tense?
Its
Have
Be
Will
What is the correct diminutive of 'arm' (body part)?
arm
arm
armeke
arm
Which space mission first brought samples from an asteroid back to Earth?
Hayabusa
OSIRIS-REx
Dawn
NEAR Shoemaker
Which ESA mission will become the first European planetary defence mission?
Hera
DART
NEO-MAPP
AIDA
Which asteroid was discovered first?
Ceres
Pallas
Juno
Vesta
Which planet did the Cassini-Huygens mission study for 13 years?
Saturn
Jupiter
Uranus
Neptune
Which famous comet has an orbital period of about 76 years?
Halley
Hale-Bopp
Hyakutake
Encke
Which NASA telescope discovered the first confirmed exoplanet around a sun-like star?
Hubble Space Telescope
Spitzer Space Telescope
Kepler Space Telescope
None of these - it was ground-based observation
Which ESA mission brought the first European astronaut to the ISS?
Soyuz TM-31 (Expedition 1)
STS-122
Soyuz TMA-1
STS-98
Which Dutch astronomer discovered the structure of the Milky Way through radio astronomy?
Jan Oort
Christiaan Huygens
Anton Pannekoek
Willem de Sitter
What is 'Vehicle-to-Grid' (V2G) technology?
Electric cars feeding power back to the grid
Navigation systems sharing traffic information
Automatic parking via GPS
Communication between vehicles and traffic lights
What is the name of the famous Dutch clipper that made the fastest voyage to Australia in 1869?
Thermopylae was British, the fastest Dutch was the City of Amsterdam
Cutty Sark
Flying Dutchman
Amsterdam Packet
What is the expected lifespan of a modern electric bus?
12 years
8 years
15 years
10 years
Which aircraft manufacturer produced the famous 'Spitfire' fighter plane?
Supermarine
Hawker
De Havilland
Avro
What is the name of Aston Martin's 2019 hypercar?
Valkyrie
Valhalla
Vulcan
Vanquish
In which country was the first driving licence issued?
France
Germany
United Kingdom
United States
What is the primary energy source for most electric trains in the Netherlands?
Wind energy
Solar
Nuclear energy
Hydropower
What percentage of road markings should be reflective for optimal visibility?
15-25%
30-40%
5-10%
45-55%
On a survey map with scale 1:750,000, the coastline measures 16 cm. How many kilometres of coastline is this really?
120 kilometres
1200 kilometres
75 kilometres
240 kilometres
How many nanoseconds are in one microsecond?
1,000 nanoseconds
100 nanoseconds
10,000 nanoseconds
10 nanoseconds
What is the volume of a rectangular box 12 cm long, 8 cm wide and 5 cm high?
480 cm³
400 cm³
560 cm³
320 cm³
How many kilograms does the tongue of a blue whale weigh?
2,700 kg
3,400 kg
1,900 kg
2,200 kg
What is the sum of the first 10 odd numbers?
100
55
81
121
A bottle of wine contains 750 ml. How many cubic centimetres is that?
750 cm³
75 cm³
7500 cm³
7.5 cm³
In the sequence 1, 11, 21, 1211, 111221, ..., what is the next element?
312211
1112213
211321
1321121
How many degrees is the sum of all the interior angles of a regular pentagon?
540°
450°
600°
720°
What does 'anti-aliasing' mean in computer graphics?
Smoothing jagged edges
Increasing the frame rate
Compressing textures
Synchronising audio and video
What technology is used for wireless connectivity in the Nintendo Switch Pro Controller?
Bluetooth
Wi-Fi Direct
2.4GHz proprietary
NFC
What is the name of Link's horse in The Legend of Zelda: Breath of the Wild?
Epona (optional via amiibo)
Roach
Agro
Bucephalus
What is the primary function of a TPM (Trusted Platform Module)?
Hardware-based cryptographic key storage
Temperature monitoring of processors
Managing automatic software updates
Setting network traffic priorities
What is the main function of a reverse proxy?
Forwarding client requests to backend servers
Blocking malicious traffic
Compressing image files
Generating SSL certificates
In Overwatch, which class does the hero 'Mercy' belong to?
Support
Tank
Damage
Defense
What is the standard input lag of a CRT monitor?
0 ms
1 ms
5 ms
16 ms
In what year was the CD-ROM first introduced?
1985
1983
1987
1982
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 gas law describes the relationship between pressure, volume and temperature?
Ideal gas law (PV=nRT)
Newton's law
Ohm's law
Hooke's law
What property does an achromatic lens have?
Minimal chromatic aberration
Perfect spherical surfaces
Very high refractive index
Automatic focus
What is the characteristic energy of thermal neutrons in a nuclear reactor?
0.025 eV
1.5 eV
10 keV
2 MeV
What happens to the viscosity of a liquid when the temperature increases?
Viscosity drops
Viscosity rises
The viscosity remains the same
Viscosity becomes zero
What is the Joule-Thomson effect?
Temperature change during adiabatic expansion of a gas
Heat generation by electrical resistance
Temperature rise due to compression
Heat transfer by radiation
Which type of antenna radiates circular polarisation?
Helix antenna
Dipole antenna
Yagi antenna
Parabolic antenna
What is the osmotic pressure of seawater approximately?
25 atmosphere
10 atmosphere
50 atmosphere
5 atmosphere
Which ion combination forms a neutral solution?
Na⁺ and Cl-
NH₄⁺ and Cl-
Na⁺ and CH₃COO-
Al³⁺ and Cl-
Which substance acts as an electron carrier in photosynthesis?
NADPH
ATP
Glucose
Chlorophyll
What is the basic constant (Kb) of ammonia at 25°C?
1,8 × 10-⁵
5,6 × 10-¹⁰
1,0 × 10-¹⁴
4,3 × 10-⁷
What is the molar mass of tetrafluoromethane (CF₄)?
88.00 g/mol
92.15 g/mol
84.32 g/mol
96.47 g/mol
Which gas was first used as a chemical weapon during World War I and is known as 'mustard gas'?
Bis(2-chloroethyl)sulphide
Phosgene
Chlorine gas
Hydrogen cyanide
Which property of a solution changes when an electrolyte is added?
Conductivity
Colour
Smell
Transparency
What is the degree of ionisation of a 0.1 M acetic acid solution (Ka = 1.8 × 10-⁵)?
About 1.3%
About 5%
About 10%
About 0.18%
At what pH value is the degree of dissociation of acetic acid (pKa = 4.76) exactly 50%?
4,76
7,00
2,38
9,52
How does it work?
1
Create treasure hunt
Choose a category, age and location. Select from 194.354 questions in 21 categories and create a complete treasure hunt within a minute.
2
Share treasure hunt
Share the treasure hunt via a link or QR code with friends, students or colleagues.
3
Do the treasure hunt
Open the treasure hunt on your phone, follow the route and answer the questions along the way.
Create your own treasure hunt
A complete GPS treasure hunt with questions and answers within a minute. Free!
Sign up for freeOther ages
Frequently asked questions
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.