Guanajuato — Cervantes' Underground Secrets
Uncover the hidden codes in Guanajuato's tunnels, left by Festival Cervantino founder Julio de Montemayor in 1953. Decode his cryptic clues to reveal a long-buried secret before it vanishes forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1953, amid the narrow callejones and shadowy tunnels of Guanajuato's historic center, architect Julio de Montemayor orchestrated the first Festival Cervantino
Guanajuato — Cervantes' Underground Secrets
You are a historical cryptographer, arriving in Guanajuato in 2024, tasked with uncovering a long-buried truth.
In 1953, amid the narrow
The buried river that became Cervantes' subway
« Guanajuato owes its beauty to its impossible topography »— Julio de Montemayor, Municipal Archives of Guanajuato, 1953
Engineering the impossible
Guanajuato was founded in 1554 in a cañada — a narrow canyon between mountains — to exploit silver veins. This unique geographical situation created a vertical city with impossible alleys, but made the city vulnerable to floods from the Guanajuato River. The floods of 1760, 1780, 1905, and 1958 marked urban history with repeated destructions.
Julio de Montemayor, an engineer trained at the Massachusetts Institute of Technology, proposed in 1953 the boldest solution in Mexican urbanism: build a 4-kilometer underground tunnel system to permanently divert the river and simultaneously create a unique automobile circulation network. The works, completed in 1963, transformed Guanajuato into a two-level city and saved the UNESCO colonial heritage.
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.
The game downloads to your phone on start. Once the "✓ Downloaded" indicator appears, everything works without data — narration, AR, GPS and puzzles. Perfect abroad without a data plan.
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?
Underground river
Follow the diverted course of the Guanajuato River in the world's first tunnel-road system
Technical feat
Discover how one man transformed a recurring natural disaster into an urban planning miracle
Cervantes Festival
Understand how Montemayor's tunnels enabled Guanajuato to become Mexico's cultural capital
In the bowels of the colonial city
Unravel the riddle of the engineer who saved Guanajuato from the waters
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
Q01What's the difference with a regular indoor escape room?
Outdoor escape game format: no physical locks, no actor, no fixed time slot. You start when you want, progress through Guanajuato underground network with your phone, and the city itself is the set. More immersive on local history, more flexible in pace.
Q02Can we take a break mid-trail?
Of course. Stop at a café, have lunch, resume later: your progress is saved. Many players bake a meal break into the trail, especially with families.
Q03Is Guanajuato — Cervantes' Underground Secrets good for a hen / stag party?
Great fit: no costume required, the team really collaborates (it's not a linear path), and the final code earns you a souvenir photo. Pick a calm time slot — early afternoon usually.
Q04Best season to explore Guanajuato underground network like this?
Spring and autumn are the best seasons: mild temperatures, fewer tourists, gorgeous light. Summer is also great but go for early morning before 11 or late afternoon. Winter is perfectly playable, especially in southern cities — Guanajuato underground network often feels more authentic then.
Adventurer reviews
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Your turn to play
Track down Julio de Montemayor's eight clues hidden between surface and underground. From the Art Nouveau kiosk to concrete tunnels, discover how a visionary architect transformed Guanajuato's worst enemy — devastating floods — into its greatest urban asset.
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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