Pierrefonds — Viollet-le-Duc's Phantom Restoration
Decipher the architect's hidden codes buried in Pierrefonds castle. Viollet-le-Duc's 19th-century restoration conceals a darker secret—uncover the truth behind the phantom sculptures and the obsession that drove his controversial vision.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1857, Napoléon III entrusted Eugène Viollet-le-Duc with an impossible task: resurrect the ruined fortress of Pierrefonds into a monument to medieval glory
Delve into the immense ambition of Napoleon III and his architect Eugène Viollet-le-Duc, who resurrected Pierrefonds Castle from its ruins.
Step into the shoes of Maurice Ouradou, a young architect and disciple of Eugène Viollet-le-Duc, tasked with continuing his master's work after his death in 1879. Your mission takes you to Pierrefonds, in the Hauts-de-France, to oversee the final restoration phases of the castle, a true neo-medieval masterpiece. Starting from the Place de l'Hôtel de Ville, the central point of the village, open your phone: original augmented reality plans overlay the facades, Viollet-le-Duc's sketches appear on the restored towers, and the spirit of Louis d’Orléans, the first builder in 1393, whispers its secrets. Over approximately 135 minutes of a 1.5 km journey, you explore Pierrefonds' national heritage, from its ramparts to its sumptuous interiors. More than an outdoor escape game: an interactive visit immersed in 500 years of history, with anecdotes revealed at each stop and confidential sites that classic guides overlook.
Les lieux que vous découvrirez
Les vrais lieux que vous explorerez au fil de l'aventure. Énigmes en réalité augmentée à chaque étape.
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.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
The story that haunts this land
Your journey begins in the Place de l'Hôtel de Ville, the beating heart of Pierrefonds, just 500 meters from the castle. It was here, in the midst of the historic district, that Louis d’Orléans, Duke of Valois, began building a stronghold from 1393 to monitor trade between Flanders and Burgundy. The village, surrounded by ramparts, bore witness to the strategic importance of this site in the Hauts-de-France. Here, you decipher the first coded messages, revealing the stages of the castle's destruction in the 17th century and its transformation into ruins for two centuries, before its imperial rebirth.
As you approach Pierrefonds Castle, purchased by Napoleon I in 1810, you grasp the scale of the challenge. It was in 1857 that Napoleon III entrusted Viollet-le-Duc with the restoration of this edifice as an imperial residence and museum of the Middle Ages. From 1858, work on the keep began, transforming the square tower into a symbol of rediscovered power. Your task is to ensure the continuity of this vision, immersing yourself in the Emperor's desire to recreate an idealized past for French heritage.
Your exploration leads you to the Godefroy de Bouillon Tower, the north tower, whose restoration began in 1858, under the direction of Viollet-le-Duc. Its roof was completed in 1861, testifying to the rapid progress of the construction. You examine the architectural details of this tower, as well as the Hector Tower, whose roof was completed in 1860, and discover Viollet-le-Duc's technical and aesthetic innovations, which reinvented medieval architecture to adapt it to 19th-century tastes, offering a unique example of a historical monument.
Continue towards the Pierrefonds Castle chapel, which many consider Viollet-le-Duc's masterpiece on this site. Entirely recreated, it illustrates his ability to imagine and reconstruct lost elements with historical precision and a singular artistic vision. Work continued until 1884, after Viollet-le-Duc's death in 1879, under the guidance of Maurice Ouradou. Here, you perceive the legacy of a man who left his mark on the Centre des Monuments Nationaux and tourism in the Hauts-de-France.
At the end of your journey in Pierrefonds, you have traced the history of this extraordinary castle, from its 14th-century origins under Louis d'Orléans to its grand restoration. You have perceived the genius of Viollet-le-Duc and the ambition of Napoleon III, who offered France a jewel of national heritage. This itinerary has immersed you in the history of Pierrefonds, revealing the secrets of its stones and the vision of those who shaped it. You take with you an understanding of a site that, since its opening to the public in 1867, continues to inspire visitors.
The Route
5-10 curated sites across the territory
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 · 14,90€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Practical info
Why this route?
Resurrected castle
Discover how Viollet-le-Duc reinvented medieval architecture
Imperial ambitions
Uncover Napoleon III's true intentions behind this restoration
Romantic Gothic
Explore the unique artistic world of 19th-century neo-medieval style
Every stone tells the story of two geniuses
A visionary emperor and the architect who reinvented Gothic
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 the immense ambition of Napoleon III and his architect Eugène Viollet-le-Duc, who resurrected Pierrefonds Castle from its ruins.
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
🪙+24 TripCoins granted with your booking
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