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Decipher the hidden conspiracy behind the Declaration of Independence. Eight landmarks hold the coded truth the Founding Fathers concealed from history.
📱 1 to 10 phones · 1 team per phone · Independent codes
July 1776
Step into the shoes of Benjamin Franklin, diplomat and scientist, tasked with deciphering a secret pact that united the nation's founders. Your ~135-minute mission will take you on a 1.5 km journey through the historic streets of Philadelphia, Pennsylvania, following in the footsteps of George Washington and Thomas Jefferson. At each stage of this thematic circuit, open your phone: augmented reality clues will appear on Georgian facades, commemorative plaques, and the cobblestones of the Old City District. A fragment of the Declaration of Independence materializes on Independence Hall, engraved inscriptions are revealed on the Liberty Bell, and the original plan of Carpenters' Hall comes to life. More than an outdoor escape game: an interactive tour immersed in 250 years of history, with anecdotes revealed at each stop and confidential sites that classic guides often miss.
Les vrais lieux que vous explorerez au fil de l'aventure. Énigmes en réalité augmentée à chaque étape.
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. »
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.
Places tied to your adventure — optional entries, totally up to you · per person
« We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. »— Thomas Jefferson, Declaration of Independence, July 4, 1776
Your quest for the Forgotten Oath begins at Independence Hall, a UNESCO World Heritage Site since 1979 and a National Historic Landmark. This Georgian-style building, constructed between 1732 and 1756, was where the Declaration of Independence was signed on July 4, 1776. With its 42.7-meter-high tower, it housed the Continental Congress and the Constitutional Convention of 1787, where the US Constitution was drafted. Here, you start assembling fragments of the pact, exploring secrets that this assembly hall, capable of seating 300 people, has kept for centuries.
A short walk away, the Liberty Bell Center reveals a crucial stage of your investigation. The bell, cast in 1752 in England by the Whitechapel foundry and weighing 2,081 pounds (944 kg), is a symbol of American liberty. Its major crack, which appeared in 1835 during a ringing for George Washington's birthday, tells a story of resilience. The engraved inscription, 'Proclaim Liberty throughout all the Land unto all the Inhabitants thereof' (Leviticus 25:10), was an emblem of the abolitionist movement in the 19th century. Puzzles around the Liberty Bell bring you closer to the profound meaning of the oath.
Continue your exploration to Carpenters' Hall, a Georgian-style building constructed in 1770 by the Carpenters' Company of Philadelphia, the oldest trade union building in the United States. This site hosted the First Continental Congress in September 1774, a crucial meeting before independence. With its red brick facade and cut-stone details, Carpenters' Hall, still owned and managed by the company founded in 1724, retains the echo of the debates that forged the nation. Here, you will discover architectural clues that shed light on the intentions of the Founding Fathers.
The route then leads you to Franklin Court, the site of Benjamin Franklin's residence (1706-1790), destroyed in 1812. Architect Robert Venturi created an archaeological reconstruction in stainless steel in 1976, marking the footprint of the original building. Franklin established the Academy of Pennsylvania here in 1751 and the Library Company in 1731, key institutions for education and the dissemination of ideas. The underground museum, with its original artifacts and excavated remains, offers insight into the life of this central figure and documents related to the oath.
Your investigation culminates with the understanding that the Forgotten Oath is not just a document, but a spirit—that of Philadelphia, 'The City of Brotherly Love.' Visiting Christ Church Burial Ground, founded in 1719, you will pass Benjamin Franklin's grave, accessible via a wrought-iron gate. Over 1,400 people are buried here, including signers of the Declaration of Independence such as Francis Hopkinson and Joseph France. The tradition of throwing coins on Franklin's grave for luck symbolizes the city's enduring connection to its founders. This thematic circuit offers a total immersion into the history of Philadelphia, Pennsylvania, revealing the ideals and tensions of the era that shaped the United States.
8 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.
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.
Ready to live this adventure?
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Uncover secret annotations within an 18th-century almanac.
Explore the iconic buildings from the birth of the United States.
Follow in the footsteps of the Declaration of Independence drafters.
Freedom is never granted by law; it must be won by struggle.
Discover the courage of the men who dared to dream of a new nation.
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
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.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
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.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
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.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
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.
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).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
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.
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Uncover the Forgotten Oath of the Founding Fathers, an immersive quest in the heart of Philadelphia, the cradle of American democracy.
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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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
30€. Explorez l'histoire de la Constitution américaine avec des expositions interactives, à quelques pas d'Independence Hall.
25€. Plongez dans les événements de la Révolution américaine à travers des artefacts originaux et des dioramas immersifs.

Prix variables. Reconstruite en 1948 selon les plans originaux de 1773-1774, cette taverne historique offre une expérience culinaire authentique du XVIIIe siècle au 138 South 2nd Street.

Gratuit. Visitez le siège du Congrès américain de 1790 à 1800, où George Washington a prêté serment pour son second mandat en 1793, avec des intérieurs restaurés aux couleurs de 1793.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.