Cardona — Secret of the Crystal Charter
Uncover the hidden Crystal Charter buried by Cardona's Salt Lords. Decode medieval clues across salt mines, castle towers, and ancient gates to expose their guarded alchemical secrets before they vanish forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
Beneath Cardona's medieval heart beats the pulse of an eternal mountain of pure salt, fueling the power of its feudal lords for centuries
Cardona — The Crystalline Treasure of the Viscounts
Beneath Cardona's medieval heart beats the pulse of an eternal mountain of pure salt, fueling the power of its feudal lords for centuries. But whispers persist of a forbidden 'Crystal Charter'—a shimmering document etched into salt crystals, holding the alchemical formula for inexhaustible wealth and the curse that doomed those who sought it. Hidden during a 14th-century conspiracy among the Salt Lords, it was fragmented and concealed across the town's defenses to thwart rival barons and royal spies. You are the last descendant of a betrayed scribe, armed with a cryptic map. Race against a shadowy cabal racing to destroy the final clues. Decipher symbols carved into the castle ramparts, trace salt veins in the miners' church, and unlock the charter's secrets at hidden gates and towers. Solve the lords' riddles to reassemble the charter, break the curse, and claim the ultimate revelation buried in the salt's core. Will you expose the truth or let the crystals' secrets dissolve into legend?
A game, a guided tour and a city guide — all in one
You're not just buying an escape game. You're carrying a living city guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding step by step as you walk.
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
« It is not by gold, but by salt that Cardona achieved its greatness. »— Old popular saying from Cardona
Catalonia's White Gold
The Salt Mountain of Cardona, a unique diapiric dome in the world, is the result of millions of years of marine evaporation and tectonic movements. Salt outcrops on the surface, forming a spectacular landscape of shapes and colors, ranging from brilliant white to deep red. Since Roman times, its exploitation began, making Cardona a vital center for trade and food preservation. This mineral resource, dubbed 'white gold', has been the cornerstone of the local economy for millennia.
Control over this wealth transformed the lords of Cardona into one of the most powerful families in Catalonia. From the 9th century, with the mention of Cardona Castle, until its elevation to a duchy in 1491, the lineage of the Folc de Cardona ruled a territory whose prosperity was directly linked to the exploitation and trade of salt. The viscounts and dukes used their vast revenues to fortify their impregnable castle, beautify the town, and exert considerable political influence, leaving an architectural and historical legacy that attests to their saline grandeur.
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?
Geological Treasure
Explore the uniqueness of the Salt Mountain, a natural wonder and source of immemorial wealth.
Medieval Heritage
Delve into the history of the powerful Salt Lords and their impregnable castle.
Crystalline Charter
Reconstruct an ancient charter, a symbol of Cardona's secrets and destiny.
Salt, history, legend.
Unravel Cardona's crystalline mystery.
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, WhatsApp, 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.
Vous avez joué à le secret des cristaux de cardona? Rendez-vous dans l'email reçu après votre partie pour laisser un avis vérifié.
Your turn to play
Are you ready to decipher the secrets of the Crystalline Charter and walk in the footsteps of the Salt Lords? Cardona's history awaits to be revealed by 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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