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.
« "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.
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.
The game downloads to your phone on start. Once the "✓ Downloaded" indicator appears, everything works without data — narration, AR, GPS and puzzles. Perfect abroad without a data plan.
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, 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
Q01Concretely, how does it unfold outdoors?
You arrive in Quimper · Old town & cathedral, open the link on your phone, the story starts. It's the modern outdoor escape game: audio narration, camera puzzles, final code unlocked as a team. No install. No need to book a time slot.
Q02What walking pace should we expect?
Easy stroll: between stops you walk 3 to 7 minutes. No tough climbs unless flagged on the product page. If you really want to push, you can jog between stops, but that's not the point.
Q03Is King Gradlon's Horn good for a hen / stag party?
Great fit: no costume required, the team really collaborates (it's not a linear path), and the final code earns you a souvenir photo. Pick a calm time slot — early afternoon usually.
Q04Is King Gradlon's Horn stroller-accessible?
Depends on the exact route in Quimper · Old town & cathedral. The vast majority of stops are downtown, on sidewalks or squares. If a stair or narrow passage is involved, it's flagged on the product page. Generally: yes, doable with a standard urban stroller.
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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