The Treasure of Gisors
Did the Templars bury their gold beneath the fortress?
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1946, Roger Lhomoy, caretaker of Gisors Castle, claims to have dug a tunnel under the keep and discovered an underground chapel containing 30 metal coffers and 19 stone sarcophagi. No one ever believed him. No one ever checked.
An obsessed caretaker, a forbidden tunnel, and 30 coffers no one has ever seen
Gisors Castle stands at the border of Normandy and the French Vexin like a stone colossus. Built in the 11th century, it was the stage for centuries of conflict between the kings of France and England. But it is Roger Lhomoy's story that turned this fortress into legend. In 1946, this simple caretaker claimed to have dug alone, at night, a 16-meter tunnel under the keep and discovered an underground Romanesque chapel filled with coffers. The authorities sealed the tunnel. The mystery remains unsolved.
A game, a guided tour and a heritage guide — all in one
You're not just buying an escape game. You're carrying a living guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding as you go.
At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.
Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.
Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.
Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.
A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.
Keep access to the guide & game for 1 year. Come back any time, share it with friends.
« You will not leave this city the way you entered it. »
How does it work?
Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.
No app to download. Play directly from your browser. Guided step by step, at your own pace.
One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.
Point your phone at the façade: a historical character appears and speaks to you in your language. Golden letters magically write themselves on the wall to reveal the puzzle answer.
Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.
French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.
« "I saw a chapel thirty meters long, with statues of Christ and the twelve apostles. And nineteen stone sarcophagi. And thirty metal coffers." »— — Roger Lhomoy, caretaker of Gisors Castle, 1946
Gisors — the Templar fortress and Lhomoy's tunnel
Gisors Castle was built in 1097 by William Rufus, King of England, on a spur overlooking the Epte river — the border between the Duchy of Normandy and the Kingdom of France. For two centuries, the French and English fought over this strategic stronghold. In 1158, the Knights Templar received custody of the castle during a truce — a brief episode that would fuel centuries of legend.
In 1307, Philip the Fair orders the arrest of all Templars in France. Their treasure, supposedly immense, is never found. Rumor spreads that it was hidden before the arrests — and Gisors, briefly held by the Order, becomes the ideal candidate. No historical evidence supports this theory, but the absence of proof has never stopped a good legend.
In 1946, Roger Lhomoy, the castle caretaker, claims to have dug a 16-meter tunnel under the keep and discovered an underground chapel containing 30 metal coffers and 19 sarcophagi. Authorities send inspectors who find the tunnel but don't go deep enough. The tunnel is sealed. In 1964, André Malraux, Minister of Culture, orders official excavations — which find nothing. The mystery of Gisors continues to fascinate treasure hunters.
The Route
5 stages through the city
The gameplay: AR, camera, hidden clues
At each stop, open your phone camera: an augmented reality character appears on the façade and speaks your language. Hunt the clue — it materializes as golden letters on the real wall or floats in front of you. When you find it, the phone vibrates, an AR chest opens and reveals your answer fragment. 8 stops, 8 clues to find with the camera, 1 final code.
The stops on your route are a surprise. You'll discover them one by one, guided by your phone, starting from the meeting point.
How does it work with a group?
One phone = one team. Pick the number at checkout (1 to 10).
Solo, or a group sharing the screen. One team, one code.
Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.
Friends, bachelor/bachelorette, small office outing — each their own code, each plays at their own pace. Tiered pricing then €6 flat per phone from the 6th.
- ✓All codes are independent — play at the same time OR separately, each team advances at its own pace.
- ✓Leaderboard between your teams + global game leaderboard — each score appears in the public ranking.
- ✓More than 10 phones or need a personalized quest? Discover custom tours.
Ready to live this adventure?
Get my code · 12€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Practical info
Why this route?
Templar mystery
Dive into one of France's greatest archaeological enigmas — the lost treasure of the Templars.
Medieval fortress
Explore an 11th-century castle with keep, underground passages, and prisoner's tower with centuries-old graffiti.
Historical investigation
Cross-reference Lhomoy's testimony, archives, and mason's marks to reconstruct the truth.
High difficulty
A demanding escape game with medieval cryptograms, Templar symbolism, and archaeological logic.
30 coffers. 19 sarcophagi. A sealed tunnel. The truth is under your feet.
Descend into Normandy's most buried mystery.
9 features nobody else has
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
AR treasure chest
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
AR narrator character
Point your phone at the façade: a knight, witch, monk, sailor, detective or ghost appears full-screen and speaks to you in your language with their dedicated ElevenLabs voice (each character has their own unique voice) — your living guide.
Magic golden letters
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
Written + audio narration
Every puzzle available as text AND voice-over: read at your own pace or listen eyes-free while walking. Great in groups and for accessibility.
360° radar + vibration
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Heritage storytelling
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
Progressive AI hints
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
AR selfie memento
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, WhatsApp, TikTok.
Zero app to install
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
Frequently asked questions
Q01Do I need to download an app?
No, never. You get a link, you click, it plays in your browser. That's the point of a PWA: same as an app, without the hassle.
Q02Does it work offline?
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
Q03How long does a game take?
1 h 30 to 2 h 30 depending on your pace. The timer runs but only for the leaderboard — you play at your own tempo.
Q04What happens if I'm stuck?
You get 3 levels of hints per puzzle (increasing penalty). If truly stuck, you can skip the step (45-min penalty but you keep going).
Q05What's the age range?
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Q06What if my city isn't in the catalogue?
Pre-register or contact us — we'll email you as soon as your city is live.
Q07What is augmented reality exactly?
Point your phone at the façade: a historical character appears full-screen and speaks to you in your language. At the puzzle climax, golden letters magically write themselves on the real wall — that's your answer. After each puzzle solved, a treasure chest floats in front of you. Seeing is believing.
Avis des aventuriers
3.0/5 · 1 avis vérifié
- FRANCK GUERREAU
Did you play le tresor de gisors? Check the email you received after your game to leave a verified review.
Your turn to play
From the keep to the underground passages, from the church to the ramparts — investigate the Templar treasure in an outdoor escape game at the heart of Gisors fortress, where one man swore he saw the impossible.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
🔒Secure payment · Code in 5 min · Free cancellation
🪙+15 TripCoins granted with your booking
Other escape games in France
View France→More destinations, tours & urban treasure hunts across the country
Explore other cities in France
Rouen
Joan of Arc's city and Monet's cathedral
Versailles
The Sun King's palace and its intrigues
Paris
The City of Light, cradle of riddles and legends
Reims
Coronation cathedral of the kings of France
Arromanches
Gold Beach & Mulberry artificial harbour
Lille
Capital of Flanders, between bricks and beers