Cahokia — Monks Mound's Hidden Curse
Uncover the curse behind Monks Mound's mass graves and decipher the Woodhenge ritual that doomed Cahokia's elite. Solve the ancient conspiracy before it claims more victims.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the 11th century, Cahokia thrived as North America's greatest city, its 120 earthen mounds rising like silent sentinels around the colossal Monks Mound
Cahokia — Monks Mound's Hidden Curse
You are a loyal acolyte of the Cahokian Sun Priests, tasked in 1349 with understanding the city's sudden demise.
The 11th century saw Cahokia thrive
Cahokia – The Forgotten City of the Sun
« The mounds are not tombs, but markers of time, earthen clocks aligned with the heavens. »— Mississippian Wisdom, orally transmitted
The Mystery of the Mound Builders
Cahokia was the largest and most sophisticated pre-Columbian Native American settlement north of Mexico, existing for approximately 600 years (600-1400 AD). At its peak, around 1050 AD, it housed between 10,000 and 20,000 inhabitants, rivaling the population of London at the same time. The city was characterized by about one hundred earthen mounds, built without the aid of metal tools or wheels. The largest of these is Monks Mound, a massive structure 30 meters high with a base larger than the Great Pyramid of Giza. These mounds served residential, ceremonial, and mortuary purposes, indicative of a complex and hierarchical society.
The people of Cahokia, part of the Mississippian culture, were accomplished farmers, cultivating corn, squash, and beans. They were also skilled artisans, producing sophisticated pottery and tools. The site also featured a 'Woodhenge,' a circle of wooden posts aligned with the solstices and equinoxes, demonstrating advanced astronomical knowledge. The reason for Cahokia's abandonment around 1400 AD remains a subject of debate, with theories ranging from climate change to resource depletion, internal conflicts, or population shifts. The city left an immense archaeological legacy, designated a UNESCO World Heritage site, which continues to reveal the secrets of this lost civilization.
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?
Decipher Forgotten Symbols
Interpret the carvings and alignments left by the ancient Mississippians.
Follow Solar Alignments
Use the astronomy of the mound builders to reveal their secrets.
Explore Ancient Trails
Walk the historic paths of this World Heritage city.
The Stars Guide, the Earth Tells
Discover the prophecies of the mound builders.
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
Dive into Cahokia's millennial history. Solve the riddles left by an advanced civilization, decipher their cosmic calendar, and reveal the truth behind their mysterious exodus. The past calls to you.
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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