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Decipher the hidden history of Portland's notorious Shanghai Tunnels—a network of underground passages where workers were once trapped and traded. Uncover the truth behind the city's darkest secret.
📱 1 to 10 phones · 1 team per phone · Independent codes
Beneath the cobblestones of Portland's Old Town lies a labyrinth of tunnels where fortune seekers, desperate workers, and criminal syndicates once collided
You are Michael Jones, the explorer who reopened Portland's Shanghai Tunnels in the 1960s.
Your mission: unearth the secrets of a district shaped by river trade,
Delve into the depths of Portland, where the cobblestones of Old Town Chinatown still whisper tales of its maritime past and mysterious tunnels.
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
Your quest begins at Skidmore Fountain, erected in 1888 by Henry Weinhard. This 55-foot-tall fountain, listed on the National Register of Historic Places in 1978, is the heart of Ankeny Square and Old Town Chinatown. It served as a public watering point, and its location testifies to the central role of the district, once Portland's first downtown developed in the 1850s. Surrounding it, 19th-century buildings recall the city's port origins, a key sector for Oregon's economy and Portland's unofficial nickname: "The City That Works."
As you head towards Waterfront Park, you pass the remnants of Portland's former industrial waterfront. This linear park, developed in the 1970s, stretches for about 1.5 km in the Old Town area. Here stood the historic docks of the 1890s where ships once berthed. It was from this location that the famous Shanghai Tunnels, or Portland Underground Tours, began. These underground passages were used to transport goods directly to the basements of businesses and hotels, avoiding surface traffic, a common practice in this Oregon district.
The exploration of the Shanghai Tunnels Myth leads you to the Merchant Hotel, now Old Town Pizza & Brewing. Built in 1880, this luxury hotel is renowned for its original lobby, whose reception desk now serves as a counter. Guided 'Haunted Shanghai Tunnel Tours' of 90 minutes have departed from this site since the 1970s, offering access to a 14,000-square-foot portion of the old basements. The original decorative cast-iron posts of the Merchant Hotel, visible in the restaurant, are silent witnesses to the tales of 'shanghaiing' and human trafficking that marked the history of this Portland neighborhood in the late 19th century.
Your journey then takes you to the Chinatown Gate, a monumental 40-foot-tall gate, erected in 1986 at the entrance to Old Town Chinatown. Adorned with traditional Chinese tiles and dragons, it marks the historic district where Chinese immigrants lived in the 19th century. Located less than 500m from the historic basements of the Shanghai Tunnels, it symbolizes the link between the Chinese community and the waterfront's port activities. This gate is an important landmark for understanding Portland's heritage and its historic district.
At the end of this stroll through the Old Town Chinatown Historic District, you will have unearthed the layers of history hidden beneath Portland's cobblestones. From the legends of tunnels sealed in 1940 to the proven facts of crimping and illegal trade, you've seen how this district, listed on the National Register of Historic Places in 1978, shaped Oregon's identity. The thematic circuit has revealed a resilient city, "The City That Works," where every edifice tells a part of its tumultuous past and its evolution into a modern metropolis, rich in its heritage and secrets.
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?
Get my code · 12€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Gather the secret messages of a forgotten activist for freedom.
Explore the streets that hide the stories of the famous Shanghai Tunnels.
Discover the cultural richness and buried secrets of Portland's Chinatown.
Bring justice to forgotten souls.
The time has come to unmask the truth.
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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Delve into the depths of Portland, where the cobblestones of Old Town Chinatown still whisper tales of its maritime past and mysterious tunnels.
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
More ideas for self-guided walking tours, scavenger hunts & city quests in the same city

Uncover Captain Blackwood's hidden logbook revealing the smugglers' routes through Portland's shadowy waterfront. Decode clues at historic landmarks to expose the conspiracy before it's lost forever.

Decode the Crimp's hidden ledger and expose the sinister network of kidnapping and forced servitude that thrived in Portland's shadowy Shanghai Tunnels. Unravel the dark secrets before they claim another soul.

Uncover the secret cipher in Henry Wadsworth Longfellow's lost manuscript, hidden amid Portland's landmarks after the 1866 Great Fire. Decode clues to reveal a family conspiracy before it's lost forever.

Decipher the coded architectural legacy of a visionary designer whose master plan for Portland's rebirth was deliberately erased. Uncover the conspiracy that buried his blueprints.

Uncover the secret plot behind Portland's vanished monuments. Track clues from toppled statues to expose the hidden conspiracy that shook the city in 2020.
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
25$. Admirez des collections d'art amérindien, asiatique et contemporain, à quelques minutes d'Old Town.
20$. Savourez une pizza et une bière artisanale dans le cadre historique de l'ancien Merchant Hotel (1880).
25$. Participez à un 'Haunted Shanghai Tunnel Tour' de 90 minutes pour explorer les basements originaux.
12$. Explorez les navires historiques et l'héritage fluvial de Portland sur le Willamette River.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.