The Forgotten Oath — Uncover the Founders' Secret Pact
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Philadelphia, Pennsylvania, United StatesThe Forgotten Oath — Uncover the Founders' Secret Pact
📍 Philadelphia, Pennsylvania, United States·🕐 2h – 2h30·📍 ~2.5 km
Also available as:HistoricalMysterySpy thrillerSupernaturalCinema

The Forgotten Oath — Uncover the Founders' Secret Pact

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

Difficulty
·From age 10 years
Starting point :Independence Hall, 520 Chestnut St, Philadelphia, PA 19106

July 1776

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

Uncover the Forgotten Oath of the Founding Fathers, an immersive quest in the heart of Philadelphia, the cradle of American democracy.

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 lieux que vous découvrirez

Les vrais lieux que vous explorerez au fil de l'aventure. Énigmes en réalité augmentée à chaque étape.

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

Visit the National Constitution Centeroptional
€30. Explore the history of the US Constitution with interactive exhibits, just steps from Independence Hall.
Optionnel
/pers.
Discover the Museum of the American Revolutionoptional
€25. Dive into the events of the American Revolution through original artifacts and immersive dioramas.
Optionnel
/pers.
Enjoy historical cuisine at City Tavernoptional
Variable prices. Rebuilt in 1948 according to original 1773-1774 plans, this historic tavern offers an authentic 18th-century dining experience at 138 South 2nd Street.
Optionnel
/pers.
Attend a session at Congress Halloptional
Free. Visit the seat of the US Congress from 1790 to 1800, where George Washington took his second presidential oath in 1793, with interiors restored to their 1793 colors.
Optionnel
/pers.
Budget if you do them all / pers.~0
« 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

The story that haunts this land

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.

1775
Second Continental Congress begins
1776
Declaration of Independence adopted
1783
Treaty of Paris: end of war

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€

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🔒 Secure payment · Code in 5 min · Free cancellation

Practical info

Starting point
Independence Hall, 520 Chestnut St, Philadelphia, PA 19106
Directions on Google Maps
🕐
Duration
2h – 2h30
At your own pace
👥
Players
Unlimited
From age 10
📍
Distance
~2.5 km
Historic Center
Accessibility
Partial
Some cobblestones and uneven sidewalks
🌐
Languages
17 languages
Built-in translation

Why this route?

📜

Historical Document

Uncover secret annotations within an 18th-century almanac.

🏛️

Colonial Architecture

Explore the iconic buildings from the birth of the United States.

✍️

Founding Writings

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.

★ 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

Uncover the Forgotten Oath of the Founding Fathers, an immersive quest in the heart of Philadelphia, the cradle of American democracy.

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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