King Gradlon's Horn
He who drinks from the horn shall know the truth
📱 1 to 10 phones · 1 team per phone · Independent codes
King Gradlon's statue sits between the spires of Quimper's cathedral. Legend says that whoever drinks from his sacred horn will know the truth about the city of Ys. The horn has never been found.
A king between the spires, a lost horn, a truth buried in Quimper's alleyways
Quimper, historic capital of Breton Cornouaille, is dominated by the twin spires of its Gothic cathedral. Between them, the equestrian statue of King Gradlon — sovereign of the legendary city of Ys — has watched for centuries. Each year, during the Feast of Saint-Corentin, a man climbed to the statue to offer it a glass of wine and drink to its health. But Gradlon's sacred horn — the one that reveals truth — has vanished. Your quest: find it.
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.
« "Quimper is the most pleasant city in Brittany. You feel the Middle Ages at every street corner." »— — Gustave Flaubert, "Par les champs et par les grèves," 1847
Quimper — the capital of Cornouaille and the king between the spires
Quimper — "Kemper" in Breton, meaning "confluence" — was born at the meeting point of the Odet and the Steir rivers. Capital of the County of Cornouaille, it was the residence of Breton kings and bishops for centuries. Its Cathédrale Saint-Corentin, a masterpiece of Breton Gothic, houses between its spires the equestrian statue of King Gradlon, placed there in the 15th century.
The tradition of "King Gradlon's horn" dates back to the Middle Ages. Each year, during the patron saint's feast, a man scaled the cathedral façade to the statue, offered it a glass of wine, drank to its health, then threw the glass into the crowd. Whoever caught it without breaking it enjoyed a year of good luck.
Historic Quimper, with its medieval half-timbered streets, flower-decked bridges over the Odet, and its atmosphere of an art city, retains a unique charm. Mont Frugy, a wooded hill in the heart of the city, was according to tradition an ancient druidic worship site from which one commanded a view of all Cornouaille.
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?
Gothic cathedral
Discover one of Brittany's most beautiful Gothic buildings and the king's statue between the spires.
Medieval city
Walk the half-timbered streets, flower-decked footbridges, and picturesque squares of Quimper.
Legend of Gradlon
Follow the trail of the legendary King of Cornouaille and his sacred horn.
Family-friendly
Moderate difficulty in the city center — ideal for families and walkers.
He who drinks from the horn shall know the truth.
Find King Gradlon's sacred horn, hidden somewhere in Quimper.
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
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Your turn to play
From the cathedral to Mont Frugy, from medieval alleys to the banks of the Odet — search for King Gradlon's sacred horn in an escape game in the heart of Brittany's most charming city.
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
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