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.
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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.
What method is used to determine the age of trees without cutting them down?
Incrementboring
Stem girth measurement
Height determination
Leaf count
What is the name of the phenomenon where cold air slides under warm air?
Cold front
Heat front
Occlusion
Squall line
What percentage of global coral reefs have been lost in the last 30 years?
About 50%
About 25%
About 75%
About 10%
At what time of the year does the maple tree produce its sugary sap?
Spring
Summer
Autumn
Winter
What temperature is optimal for germinating most vegetable crops?
18-22°C
10-14°C
25-30°C
5-10°C
Which mammal has the longest gestation period?
Asian elephant
Humpback whale
Giraffe
Rhinoceros
What technique is used to keep fruit trees small and productive?
Grafting on weak-growing rootstock
Frequent watering
Additional fertilisation
Deep planting
Which characteristic soil type dominates in Drents-Friese Wold National Park?
Podzol soil
Loess soil
Kleiboden
Peaty soil
Which animal has the worst eyesight?
Mole
Bat
Hose
Crab
Which insects exhibit 'tandem running' to communicate nest locations?
Ants
Termite species
Wasp species
Bee species
Which tropical bird has the longest migration route?
Arctic tern
Albatross
Pelican
Frigatebird
How many brains does an octopus have?
9
1
3
8
What do ethologists call the behaviour in which animals suppress their fear in unfamiliar situations?
Neophobia
Anxiety suppression
Fear masking
Stress inhibition
How many eyes does a box jellyfish have?
24 eyes
8 eyes
2 eyes
50 eyes
How many times heavier is a newborn blue whale than a newborn human?
900 times
200 times
500 times
1500 times
Which tropical fish has biometric facial recognition?
Clownfish
Doctor fish
Zebrafish
Discus fish
What substance did Vikings use to bleach their hair?
Lye soap
Honey
Birch juice
Goat urine
In 1642, which Dutch explorer discovered the island that would later be called Tasmania?
Abel Tasman
Willem Barentsz
Dirk Hartog
Henry Hudson
Which US president led the invasion of Iraq in 2003?
George W. Bush
Bill Clinton
Barack Obama
George H.W. Bush
Which composer is considered the master of Renaissance polyphony?
Giovanni Pierluigi da Palestrina
Josquin des Prez
Orlando di Lasso
Thomas Tallis
Which French general led the Free French from London?
Charles de Gaulle
Philippe Leclerc
Henri Giraud
Jean de Lattre de Tassigny
In which year was the first commercial microwave oven microwave invented?
1945
1950
1942
1948
Which Russian offensive in 1916 was named after the general who led it?
The Brusilov offensive
The Samsonov offensive
The Kornilov offensive
The Denikin offensive
Which military school did Napoleon Bonaparte attend during the Revolution?
École Militaire in Paris
École Polytechnique
École Navale in Brest
École de Mars
In which province is the tradition of 'carbide shooting' most popular?
Overijssel
Gelderland
Drenthe
Groningen
What is the maximum moisture level for Dutch hard cheese?
56%
60%
52%
48%
Which Dutch shorttrack star won the first Dutch medal in the sport?
Suzanne Schulting
Yara van Kerkhof
Lara van Ruijven
Rianne de Vries
In which city was physicist Christiaan Huygens born?
The Hague
Leiden
Amsterdam
Utrecht
Which Dutch presenter presented the Sinterklaasjournaal for many years?
Dieuwertje Blok
Martijn Krabbé
Linda de Mol
Jeroen van der Boom
In which century did Dutch mills reach their greatest boom?
17th century
16th century
18th century
19th century
In which city was Princess Beatrix crowned?
Amsterdam
The Hague
Utrecht
Rotterdam
What is meant by 'cresting' on a wind turbine?
The mechanism to turn the mill into the wind
The cross-shaped construction of the blades
The system of gears
The cross beams in the fuselage
Which athletics discipline is traditionally performed as the last part of the decathlon?
1500 metres running
400-metre run
Javelin throw
Pole vault
Which gymnast introduced the 'Amanar' jump (Yurchenko with 2.5 twist)?
Simona Amânar
Nastia Liukin
Cătălina Ponor
Sandra Izbașa
Which Dutch beach volleyball players won silver at the Rio 2016 Olympics?
Alexander Brouwer and Robert Meeuwsen
Reinder Nummerdor and Richard Schuil
Christiaan Varenhorst and Steven van de Velde
Stefan Boermans and Yorick de Groot
Which judoka became known as 'the father of modern judo'?
Jigoro Kano
Kyuzo Mifune
Masahiko Kimura
Tsunetane Oda
How many teams currently exist in Major League Baseball?
30 teams
32 teams
28 teams
24 teams
Which top athlete is also known as 'The Lightning Bolt'?
Usain Bolt
Michael Johnson
Carl Lewis
Justin Gatlin
What is the nickname of the Alpe d'Huez in cycling?
The Dutch mountain
The mountain of kings
The hellish climb
The Alpine Giant
Which judo technique is performed by throwing the opponent forward with your hip?
Harai-goshi
Tsurikomi-goshi
Uki-goshi
Koshi-guruma
How many goals did Gerd Müller score in the calendar year 1972?
85
73
91
79
How many substitution options does each team have during a match?
Maximum 3 moments (with up to 5 players)
5 moments
Unlimited moments
2 moments per half
Which tactical term describes switching formations during the game?
Tactical flexibility
Gegenpressing
High pressure
Route one
What is the official name for the UEFA competition for under-19 youth teams?
UEFA European Under-19 Championship
UEFA Youth League
UEFA Junior Championship
UEFA Development Tournament
What is the traditional Bayern Munich anthem called?
Stern des Südens
Bayern Forever
Mia san mia
Rot-Weiß
What does 'third man runs' mean in attacking tactics?
Third player runs in attack
Three attackers stand still
Defender comes along
Goalkeeper comes along
What happens when the ball completely crosses the goal line between the goalposts and under the crossbar?
Goal
Corner kick
Target stairs
Kick-off
What is the penalty for a player insulting the referee?
Red card
Yellow card
Indirect free kick
Warning
Which Dutch city has the most museums per square kilometre?
Amsterdam
The Hague
Rotterdam
Utrecht
The Zambezi River forms which famous waterfall?
Victoria Falls
Boyoma Falls
Tugela Falls
Kalambo Falls
Which city is known as the 'White City' for its art deco architecture?
Tel Aviv
Miami
Casablanca
Tunis
Which Dutch city has the nickname 'Hofstad'?
The Hague
Amsterdam
Utrecht
Haarlem
Which city is also called the 'White City' because of its Bauhaus architecture?
Tel Aviv
Casablanca
Algiers
Tunis
Which cold desert stretches across parts of Mongolia and China and is known for its extreme temperature swings?
Gobi desert
Karakum desert
Kyzylkum desert
Thar desert
Which Belgian city is known for its lace industry?
Bruges
Mechelen
Ypres
Courtrai
Which organisation is responsible for producing official topographic maps in the Netherlands?
Land Registry
KNMI
CBS
Rijkswaterstaat
At what temperature does cocoa butter melt?
34-38°C
28-32°C
42-46°C
20-24°C
On average, how many grams of almond flour does one macaron shell contain?
3-4 grams
7-8 grams
1-2 grams
5-6 grams
Which fish traditionally has its best season in the cold winter months?
Cod
Mackerel
Herring
Sardine
Which nut is traditionally used in the Italian Christmas cake panettone?
No nuts, only sultanas and sugared fruit
Almonds
Hazelnuts
Walnuts
What technique is used to make Japanese castella cake?
Au bain-marie baking
Steaming in bamboo
Charcoal grilling
Freeze drying
What test can distinguish between celiac disease and gluten intolerance?
Genetic HLA test
IgE blood test
Skin prick test
Urine test
Which herb is known as 'Summer Savory' in English?
Savory
Marjolein
Oregano
Thyme
Which enzyme in pineapple helps in protein digestion?
Bromelain
Papain
Amylase
Lipase
Which city does The Flash (Barry Allen) primarily protect?
Central City
Keystone City
Star City
Coast City
Which supervillain is also known as 'The Man of Steel's Greatest Enemy'?
Lex Luthor
General Zod
Brainiac
Doomsday
What is the real name of the X-Men mutant known as Nightcrawler?
Kurt Wagner
Klaus Mueller
Franz Zimmer
Hans Gruber
In which comic did Black Widow first appear?
Tales of Suspense #52
The Avengers #1
Iron Man #1
Daredevil #81
In which US state is the Avengers Compound located?
New York
California
Virginia
Massachusetts
What is the name of the super soldier serum that made Steve Rogers into Captain America?
Super-Soldier Serum
Extremis
Compound V
Mirakuru
What is the real name of the Marvel superhero Ant-Man (the original)?
Hank Pym
Scott Lang
Eric O'Grady
Bill Foster
Which organisation tried to explore Thor's identity in early comics?
S.H.I.E.L.D.
HYDRA
AIM
The Hand
Which term describes a classification system based on evolutionary relatedness?
Phylogenetic
Morphological
Ecological
Anatomical
Which plant is used to produce quinines?
Cinchona officinalis
Digitalis purpurea
Papaver somniferum
Atropa belladonna
Which scientist introduced the binomial nomenclature system we still use to classify organisms?
Carl Linnaeus
Charles Darwin
Gregor Mendel
Ernst Haeckel
What is a retrovirus in gene therapy?
An RNA virus that integrates into DNA
A DNA virus that temporarily infects
A bacteriophage for DNA transport
A synthetic vector
On average, how much haemoglobin does a healthy man's blood contain?
14-18 g/dl
8-10 g/dl
20-25 g/dl
5-7 g/dl
Which muscle is the strongest in the human body (relative to size)?
Chewing muscle
Heart muscle
Thigh muscle
Biceps
What fungus causes ringworm in humans?
Trichophyton rubrum
Candida albicans
Aspergillus fumigatus
Cryptococcus neoformans
What is the normal blood pressure in the right ventricle during systole?
25 mmHg
120 mmHg
5 mmHg
60 mmHg
Which actor played Qui-Gon Jinn?
Liam Neeson
Ewan McGregor
Samuel L. Jackson
Christopher Lee
What is the name of Woody's owner in the beginning of Toy Story?
Andy
Sid
Buzz
Rex
Which organisation did Padmé Amidala serve as a senator?
Galactic Republic
Galactic Empire
Rebel Alliance
Trade Federation
Which 1999 animated film was praised for its innovative use of traditional and computer animation?
The Iron Giant
Tarzan
Toy Story 2
Fantasia 2000
Which Pixar film is set in Mexico during the Day of the Dead?
Coco
The Good Dinosaur
Brave
Onward
Which actor played Rambo in the 'First Blood' series?
Sylvester Stallone
Chuck Norris
Steven Seagal
Jean-Claude Van Damme
Which Pixar film is set in New York's jazz scene?
Soul
Inside Out
Coco
Onward
What emotion is wearing a yellow shirt in Inside Out?
Joy
Sadness
Anger
Fear
Which building is considered the first real skyscraper?
Home Insurance Building in Chicago
Empire State Building in New York
Flatiron Building in New York
Willis Tower in Chicago
Which artist painted 'Les Demoiselles d'Avignon' (1907), considered the starting point of Cubism?
Pablo Picasso
Georges Braque
Juan Gris
Fernand Léger
Which art movement is associated with the 1863 'Salon des Refusés' in Paris?
Realism
Impressionism
Romance
Symbolism
What graphic technique did Max Ernst use for his collage novels?
Frottage and grattage
Lithography
Screen print
Engraving
Which artist created the famous installation 'Crochet Coral Reef' on climate change?
Christine and Margaret Wertheim
Olek
Toshiko Horiuchi MacAdam
Janet Echelman
What is the name for the traditional Peruvian technique of weaving alpaca wool in complex patterns?
Chullo weaving
Poncho weaving
Manta weaving
Vicuña weaving
'Rayonism' was an avant-garde movement that originated in which country?
Russia
France
Italy
Germany
Which fashion trend was made popular by the 1983 film 'Flashdance'?
Off-shoulder sweatshirts
Neon colours
Leg warmers
Headbands
What was the original application of the invention we now know as superglue?
Clear plastic for gunfish
Dental adhesive
Aircraft construction
Medical sutures
How many regular polyhedra (Platonic bodies) are there?
5
4
6
7
What invention did Johannes Gutenberg make around 1440 that revolutionised the dissemination of information?
The printing press with loose letters
The paper
The ink
Bookbinding
What is the average temperature decrease per 100 metres altitude in the troposphere?
0,65°C
1,2°C
0,3°C
2,1°C
Which physicist discovered the quantum mechanics property known as the 'uncertainty principle'?
Werner Heisenberg
Erwin Schrödinger
Niels Bohr
Max Planck
Which Earl Dickson invention is still used daily for minor injuries?
The Band-Aid
Iodine
Gauze dressing
Antiseptic
What is the function of markers in genetically modified organisms?
To identify which cells are successfully transformed
To increase growth rate
To give resistance to disease
To improve taste
What is the greatest common denominator of 48 and 18?
6
9
12
3
Which Zimbabwean musician popularised the mbira internationally in the 1980s?
Thomas Mapfumo
Oliver Mtukudzi
Stella Chiweshe
Chiwoniso Maraire
What is the relative major of F# minor?
A major
D major
E major
B major
Which vocal coach developed the 'Speech Level Singing' method?
Seth Riggs
David Jones
Roger Love
Brett Manning
Argentine tango originated in which district of Buenos Aires?
La Boca
San Telmo
Barracas
Palermo
What does the term 'cadence' mean in music theory?
A harmonic progression that concludes a phrase
A quick run of notes
A repetition of a melodic motif
A sudden change of pace
What is a 'melisma' in vocal music?
Multiple notes on one syllable
A very high note
A gentle singing technique
An instrumental interlude
Which instrument revolutionised Charlie Parker's influence in bebop jazz?
Alto saxophone
Tenor saxophone
Trumpet
Piano
How many semitones does an excess quarter contain?
6
5
7
4
What is the correct past tense of 'create' (meaning: to create)?
created
scooped
kicked
scooped
How do you spell the adjective 'belonging to the tropics' correctly?
tropical
tropies
tropical
trobic
What is an 'ottava rima'?
An eight-line stanza with rhyme scheme ABABABCC
An Italian eight-line song
A musical poem form
An eight-letter verse
Which diminutive is used for a small amount of time?
hour
while
minute
second
What is the name of the dot that is higher than an ordinary dot (-)?
Centre
Raised point
Centre point
Interpoint
What is the plural of 'plenum'?
plena
plenums
plenums
plenen
How do you spell the past tense of 'cut' correctly?
cut
pinch
cut
blinked
What is the antonym for 'peripatetic'?
Sedentary
Itinerant
Nomadic
Roaming
Which NASA telescope discovered the most confirmed exoplanets so far?
Kepler Space Telescope
Hubble Space Telescope
Spitzer Space Telescope
James Webb Space Telescope
How many times can a Falcon 9 Block 5 be reused, according to SpaceX?
10 times
5 times
15 times
3 times
In which year was the International Space Station (ISS) manned for the first time?
2000
1998
2001
1999
What is the name of the ESA mission that measures gravitational waves from space?
LISA Pathfinder
Planck
Gaia
INTEGRAL
What is the name of the reusable first stage of the New Glenn rocket?
Booster
Core Stage
First Stage
Lower Stage
How many Apollo missions have successfully landed on the moon?
6 missions
7 missions
5 missions
8 missions
What colour is the flame of a rocket engine burning hydrogen and oxygen?
Almost invisible/light blue
Bright orange
Bright yellow
Deep red
Which space mission discovered ice water on the moon?
Lunar Reconnaissance Orbiter
Apollo 17
Luna 24
Chang'e 4
Which aircraft manufacturer produced the DC-3, one of the most influential passenger planes in history?
Douglas Aircraft Company
Boeing
Lockheed
Curtiss-Wright
What technology is used for 'smart' road markings that change colour?
LED strips
Thermochromic paint
Photochromic materials
Electroluminescent coating
What is the official term for the white broken line in the middle of the road?
Axis marking
Lane marking
Lacey
Runway section
What shape do most professional cycling tyres have in cross-section?
V-shaped
Round
Flat
Rectangular
Which Dutch bicycle manufacturer has been around the longest?
Gazelle (founded 1892)
Batavus (founded 1904)
Sparta (founded 1917)
Union (founded 1904)
What colour of light does a ship on starboard show at night?
Green
Red
White
Yellow
Which German motorway is considered the world's first?
AVUS (Automobil-Verkehrs- und Übungsstraße)
Autobahn A1
Munich-Salzburg motorway
Autobahn A9
What does a double solid white line on the carriageway mean?
Absolute ban on overtaking
Directional separation
Danger zone
Speed limit
How much is 5⁴ (5 to the 4th power)?
625
525
725
500
On a 1:75,000 scale cycling map, a cycle route measures 24 cm. How many kilometres long is this route really?
18 kilometres
180 kilometres
32 kilometres
9 kilometres
A sector has a central angle of 150° and a radius of 12 cm. What is its area?
60π cm²
144π cm²
30π cm²
72π cm²
Which comma number lies between 0.6 and 0.7?
0,65
0,75
0,56
0,605
How many different ways are there to line up 4 people?
24
16
12
8
A pentagon has an apothem of 6 cm and a circumference of 40 cm. What is its surface area?
120 cm²
240 cm²
200 cm²
80 cm²
How much is 777 + 888 + 999?
2664
2654
2674
2644
How much does Queen Elizabeth II's crown weigh?
2.23 kg
3.18 kg
1.67 kg
2.84 kg
Which cryptographic method is used in the RSA algorithm?
Asymmetric encryption
Symmetric encryption
Hash function encryption
Elliptic curve encryption
What technology will be used for the PlayStation 5's wireless controllers?
Bluetooth 5.1
Wi-Fi Direct
Bluetooth 4.0
Proprietary 2.4GHz
What is the name of the AI director in Left 4 Dead who adjusts the difficulty?
Director
Overlord
Master
Controller
In what year was Steam launched by Valve?
2003
2005
2001
2004
What design pattern is used to make incompatible interfaces compatible?
Adapter
Bridge
Facade
Proxy
Which CSS selector has the highest specificity?
Inline style attributes
ID selectors
Class selectors
Element selectors
What is the maximum theoretical speed of Wi-Fi 6E (802.11ax)?
9.6 Gbps
6.9 Gbps
3.5 Gbps
1.3 Gbps
What was the capacity of the first IBM hard disk from 1956?
5 MB
10 MB
1 MB
20 MB
What happens to the boiling point of water at lower atmospheric pressure?
Boiling point drops
Boiling point rises
The boiling point remains the same
Water can no longer boil
Which physicist discovered the law of conservation of energy?
Julius Robert Mayer
James Prescott Joule
Rudolf Clausius
Hermann von Helmholtz
What is the principle of adaptive optics in telescopes?
Real-time correction of atmospheric disturbances
Automatic focus adjustment
Digital image enhancement
Spectral filtering
How many Pascal equals 1 bar?
100,000 Pa
10,000 Pa
1,000 Pa
1,000,000 Pa
Which unit is NOT suitable for measuring pressure?
Joules per cubic metre
Pascal
Bar
Torr
What is the SI symbol for magnetic flux?
Φ (Weber)
B (Tesla)
H (Amps per metre)
μ (Henry per metre)
What is the energy of a photon with a wavelength of 500 nanometres?
2.48 eV
1.24 eV
4.96 eV
0.62 eV
What does the first law of thermodynamics describe?
Conservation of energy
Increase in entropy
The absolute zero point
Thermal equilibrium
Which property of bismuth is unique among metals regarding its density upon solidification?
It expands upon coagulation
It retains exactly the same density
It partially evaporates
It becomes magnetic
What is the product of [H⁺] × [OH-] in an aqueous solution at 25°C?
1,0 × 10-¹⁴
1,0 × 10-⁷
14
7
At what temperature does water have its maximum density?
4°C
0°C
2°C
6°C
What phenomenon causes the colour change in dichroic crystals?
Different absorption along different crystal axes
Temperature sensitivity
Light scattering
Chemical decomposition
What is the main product of the nitriation of toluene?
para-nitrotoluene
meta-nitrotoluene
ortho-nitrotoluene
2,4-dinitrotoluene
What is the name of the process by which hydrogen and oxygen recombine to form water?
Jet gas reaction
Hydrolysis
Electrolysis
Oxidation
What gas is used in plasma etching in the semiconductor industry?
Sulphur hexafluoride (SF₆)
Argon
Helium
Nitrogen
At what temperature does inversion take place in the Joule-Thomson effect for nitrogen gas?
-147°C
-162°C
-134°C
-155°C
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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.