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Decipher the mystery behind the Central City Opera House's hidden premiere—a lost score composed during the 1870s gold boom that vanished before opening night.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1878, Welsh and Cornish miners built the Central City Opera House as a monument to their newfound wealth
You are a trusted associate of Emma Caldwell, arriving in Central City in 1878 for the opera's final performance.
Your mission: find the lost libretto of an unreleased opera,
Dive into Colorado's golden age, where the Gold Rush shaped Central City, 'The Richest Square Mile on Earth'.
Your quest begins at the Central City Opera House, the first professional opera west of the Mississippi, built in 1878. Imagine the glittering Colorado society that flocked here, including President Ulysses S. Grant in 1879, to attend a performance. Restored in 1932 by the Central City Opera Association, this 550-seat National Historic Landmark has stood the test of time, preserving the memory of the great voices that resonated within its walls. It is here that the first clues to the lost opera will be revealed, laying the groundwork for your exploration of the Central City Historic District.
Continue to the Teller House, opened in 1872 as a luxury hotel, a testament to the opulence of the Gold Rush. It was in this three-story brick building, located at 261 Eureka Street, that President Ulysses S. Grant stayed in 1873. A famous mural portrait of Grant, painted directly on the wall in 1936, still graces the premises. The walls of this edifice, listed on the National Register of Historic Places in 1971, have witnessed fortunes and disappointments, and perhaps a fragment of the libretto you seek is hidden behind this portrait.
Your path then leads to the Gilpin County Courthouse, built in 1899 in the Second Empire style, with its distinctive copper dome. This seat of Gilpin County, measuring approximately 30m x 20m, served as a jail in its basement until 1960. Listed on the National Register of Historic Places in 1972, it symbolizes order and justice in this once wild town. The archives it contains are a treasure trove of information for detectives like you, and perhaps a mention of the lost opera's composer is preserved there, guiding you to the next stage of your interactive Central City tour.
Discover the St. James United Methodist Church, built in 1861, the oldest Methodist church in the state of Colorado. This wooden building, with its 15m bell tower, could accommodate 200 worshippers and was even used as a hospital during cholera epidemics in the 1860s. Restored in 1940, it houses an organ dating from 1870. This place of worship, far from the tumult of the mines, offers a different perspective on the lives of the inhabitants of Central City and Colorado. The hymns sung here might hold a melodic key to the vanished opera.
Conclude your journey by exploring Main Street and the Register-Call Building, at 107 Main Street. Main Street, paved in the 1870s, was the center of the 1859 gold boom, with over 20 saloons for 2,000 inhabitants in 1860, and preserves 90% of its original Victorian architecture. The Register-Call Building, constructed in 1879 to print the newspaper, with its steam presses installed in 1880 and a circulation of 2,000 copies, was listed on the National Register in 1978. Your exploration of Central City, a unique thematic circuit in Colorado's heritage, will have allowed you to reconstruct the history of the lost opera, transforming a simple visit into a deep immersion into the soul of the Gold Rush.
Your exploration of the Central City Historic District, a National Historic Landmark, will have been a true dive into the history of Colorado's Gold Rush. By following the augmented reality clues, you will have discovered the secrets of the Central City Opera House, the Teller House, the Gilpin County Courthouse, the St. James United Methodist Church, and Main Street. This Central City scavenger hunt will have allowed you to see the city from a different angle, revealing Colorado's heritage and the excitement of that era. You will take with you not only the recovered libretto, but also an intimate understanding of what made Central City 'The Richest Square Mile on Earth'.
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. »
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.
Places tied to your adventure — optional entries, totally up to you · per person
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.
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.
Ready to live this adventure?
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Decipher a lost melody, fragment by fragment, that tells the secret history of the opera.
Explore how mining wealth shaped Central City's cultural ambition.
Immerse yourself in the audacious spirit of Wild West miners and artists.
When Gold Sings, History Narrates.
Discover the true lyrical spirit of Central City's pioneers.
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
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.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
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.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
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.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
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.
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).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
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.
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Dive into Colorado's golden age, where the Gold Rush shaped Central City, 'The Richest Square Mile on Earth'.
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
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
15€. Visitez une véritable mine d'or souterraine et découvrez les techniques d'extraction utilisées à l'époque.

5€. Explorez les expositions sur la ruée vers l'or et la vie quotidienne des mineurs à Central City.
Prix variable. Savourez des bières artisanales et des pizzas dans un cadre historique, rappelant les saloons d'antan de Central City.
Gratuit. Suivez le chemin du découvreur John H. Gregory, le long du site de la première veine d'or, pour une immersion naturelle dans le Colorado.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.