National Mall — L'Enfant's Lost Dream
Decipher the hidden codes in L'Enfant's 1791 plan to uncover why George Washington fired him and reveal the secret features erased from the capital's blueprint.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1791, French engineer Pierre Charles L'Enfant unveiled his visionary plan for the new American capital: grand avenues, monumental circles, and a sweeping 'Grand Avenue' from Capitol Hill to the Pot
National Mall — L'Enfant's Lost Dream
You are a contemporary architectural historian, specializing in urban planning, tasked in Washington D.
C. with re-examining the legacy of Pierre Charles L'Enfant. In 179
Pierre L'Enfant: The Forgotten Architect of the American Capital
« « I have drawn a city which is both a fortress and a temple. » »— Pierre Charles L'Enfant
The Birth of a Capital
After the American Revolution, the need for a permanent, neutral capital became apparent. In 1790, the Residence Act was signed, authorizing the creation of a federal district on the banks of the Potomac River. President George Washington chose the site and entrusted Pierre Charles L'Enfant with its development. L'Enfant, who had served in the Continental Army, drew inspiration from European city plans like Versailles, but with a distinctive republican vision, incorporating vast green spaces and diagonal axes connecting major points of interest.
L'Enfant's plan was ambitious, but his uncompromising nature and financial demands led to frequent conflicts with the commissioners appointed to oversee the project. In 1792, he was dismissed, and his original plan was modified and simplified by others. Despite this, the foundations of Washington D.C. and the bulk of its majestic current urban structure bear the indelible imprint of his original vision, a testament to his urbanistic genius.
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.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
The Route
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.
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?
Urban Planning
Discover the foundational principles of modern urbanism.
Founding Architecture
Explore the monuments that built America's identity.
Forgotten Legacy
Reconstruct the work of an unrecognized visionary.
Washington D.C.: A city built on vision, shaped by history.
Decode the secrets of its foundation.
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
Soyez le premier à partager votre expérience.
Did you play le reve perdu de lenfant? Check the email you received after your game to leave a verified review.
Your turn to play
Dive into history and unravel the threads of Washington D.C.'s original plan!
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
Other escape games in Washington D.C. – National Mall and Capitol Hill
See all games in Washington D.C. – National Mall and Capitol Hill→More ideas for self-guided walking tours, scavenger hunts & city quests in the same city
Capitol Hill — Decode the Silent Sentinels' Underground Network
Decipher the hidden messages left by the Silent Sentinels and expose the suffragettes' secret coordination network that challenged a president and changed democracy.
Lincoln Cipher — Decipher the Assassin's Code
Uncover the hidden cipher Lincoln left behind, linking his final days to a Confederate plot that threatens to rewrite history. Decode clues at iconic DC landmarks to expose the truth before it's lost forever.
Ford's Theatre — Decipher Lincoln's Assassin
Uncover the conspiracy behind Lincoln's assassination at Ford's Theatre. Follow hidden clues through Civil War-era Washington to expose the plot that changed a nation.
Foggy Bottom — Uncover the Watergate Conspiracy
Decipher the hidden network behind the 1972 break-in that toppled a presidency. Follow the trail of conspirators, wiretaps, and cover-ups across the scandal's ground zero.
Other escape games in États-Unis
View États-Unis→More destinations, tours & urban treasure hunts across the country
Explore other cities in États-Unis
Washington DC
At the heart of American power, amidst monuments and museums
Annapolis
Maryland's historic and nautical capital
Baltimore
Historic port, vibrant soul
Harpers Ferry
Where history and nature converge
Gettysburg
Where American history was forged in blood.
Dover
Delaware's historic capital
