Metz Historic Center — Graoully's Secret
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Historic Center of Metz, FranceMetz Historic Center — Graoully's Secret
📍 Historic Center of Metz, France·🕐 2h – 2h30·📍 ~2.5 km
Legends & tales
Also available as:HistoricalMysterySupernaturalFairy tale

Metz Historic Center — Graoully's Secret

Uncover the hidden incantation that tamed the Graoully dragon terrorizing Metz. Follow Saint Clement's footsteps through ancient streets to banish the beast forever.

📱 1 to 10 phones · 1 team per phone · Independent codes

Difficulty
·From age 10 years
Starting point :Cathedral Saint-Étienne Forecourt, Metz

In the shadowed heart of Metz's historic center, the monstrous Graoully once lurked in the ruins of the Roman amphitheater, now the Centre Pompidou-Metz site

8
stages
~2.5 km
route
2h – 2h30
at your pace
🚶
walking

Metz Historic Center — Graoully's Secret

🎭Your Mission

You are a chronicler in Metz, in the year 1200, tasked by Bishop Robert de Chardennes to record the truth about the beast terrorizing the city.

Your

Delve into Metz's ancient legends and unmask the secrets of its mythical dragon, the Graoully, still haunting the heart of historical Lorraine.

The story that haunts this land

Your quest begins at the forecourt of Saint-Étienne Cathedral in Metz, a historic monument classified since 1840. Initiated in 1220 and completed in 1552 after 332 years of work, this former metropolitan cathedral of the Holy Roman Empire, until 1648, dominates the city. You admire its nave rising to 41.77 meters, one of the highest in France, and its 6,500 m² of stained glass, including the luminous works of Marc Chagall created between 1960 and 1968. It is here, in the heart of this flamboyant Gothic masterpiece, that the first legends of the Graoully were undoubtedly whispered, mixing faith and local folklore.

Your journey then leads you to the Metz City Hall, built between 1457 and 1480 in a flamboyant Gothic style. This building, classified as a Historic Monument since 1840, has been the seat of municipal power since its construction. Its ornate facade and spiral staircase turret, adorned with a 16th-century Renaissance gallery, bear witness to the city's rich past. It was here that important decisions for Metz were made, and perhaps even ordinances to protect residents from the legendary beast. The proximity of Place Saint-Louis, a former administrative center and medieval market, reminds you of the dynamism of this Grand-Est city.

Continue towards the Porte des Allemands, a double medieval fortification built between 1230 and 1250. The only remaining gate of Metz's ancient fortifications, it spans the Seille and was a strategic control point. Its name is linked to the Teutonic Knights, protectors of the city. Restored in the 19th century and classified as a Historic Monument, it is an imposing remnant of Metz's defensive past. Imagine travelers and merchants passing through this structure, perhaps carrying news of the Graoully, while the ramparts protected the population from external dangers.

Then stroll along the Esplanade de la Moselle, developed in the 19th century between 1860 and 1880 during urban modernization. This 1.2 km promenade along the Moselle offers visual perspectives on the historic bridges and the cathedral. Integrated into post-1870 urban development, it is a major relaxation and tourist promenade in Metz. Formerly, this area was perhaps a swamp where, according to tradition, the Graoully had taken up residence before being chased away by Saint Clement. The Jardin des Cinq Sens, created in the 20th century, incorporates medicinal plants, recalling ancestral remedies against ailments and fears.

Your quest concludes at the Square du Graoully, where the statue of the legendary creature of Metz folklore, erected in 1889, stands. This 3-meter monument, depicting the winged beast, symbolizes ancient dragons and Metz's cultural identity. This journey has taken you through Metz's emblematic monuments, from the flamboyant Gothic of Saint-Étienne Cathedral to the medieval fortifications of the Porte des Allemands, passing through the historic city center and Rue Taison with its half-timbered facades. You leave with a deep understanding of historical Lorraine, its heritage, and the legend of the Graoully, an urban escape game that awakens history.

280 après J.-C.
Arrival of Saint Clement, bishop and tamer of the Graoully, according to local tradition.
XIIe siècle
First written mentions of the Graoully legend in Metz's medieval chronicles.
1537
The effigy of the Graoully officially participates in the city's processions, a symbol of Metz's protection.
Far more than an escape game

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.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

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?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

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.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.

🎟️

Want to go deeper?

Places tied to your adventure — optional entries, totally up to you · per person

Musée de la Cour d'Oroptional
€8. Explore Metz's rich archaeological and medieval collections, and discover the city's history from antiquity.
Optionnel
/pers.
Centre Pompidou-Metzoptional
€12. Admire the avant-garde architecture of this museum and its modern and contemporary art exhibitions.
Optionnel
/pers.
Mirabelle tastingoptional
Variable. Taste the famous Mirabelle plum of Lorraine in all its forms: jam, tart, brandy…
Optionnel
/pers.
Moselle River cruiseoptional
€15. Enjoy a unique perspective on Metz's monuments from the waters of the Moselle.
Optionnel
/pers.
Budget if you do them all / pers.~0

The Route

8 stages through the city

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

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.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

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.
🕒No date to pick · Code valid 1 year · Play whenever you want

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

Starting point
Cathedral Saint-Étienne Forecourt, Metz
Directions on Google Maps
🕐
Duration
2h – 2h30
At your own pace
👥
Players
2 to 6 players
From age 10
📍
Distance
~2.5 km
Historic center
Accessibility
Partial
Some cobblestones and narrow passages
🌐
Languages
17 languages
Built-in translation

Why this route?

🐉

Legendary Creatures

Encounter the Graoully, Metz's mythical beast, through the city's tales and folklore.

Spectacular Augmented Reality

Witness the legends of Metz come alive: the Graoully appears, inscriptions animate before your eyes.

📜

Ancient Folklore & Mysteries

Unravel an ancient formula by exploring iconic locations linked to Metz's myths.

The past is never truly buried. It awaits to be awakened.

Will you live up to the legend?

★ Innovation 2026

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

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

Delve into Metz's ancient legends and unmask the secrets of its mythical dragon, the Graoully, still haunting the heart of historical Lorraine.

12€
1 phone
23€
2 phones
33€
3 phones
42€
4 phones
50€
5 phones
56€
6 phones
62€
7 phones
68€
8 phones
74€
9 phones
80€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 12€

No calendar booking. Code sent immediately by email.

🔒Secure payment · Code in 5 min · Free cancellation

🪙+24 TripCoins granted with your booking

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