The Forgotten Ledger — Uncover Mackinac's Lost Trade Secret
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Mackinac Island, MichiganThe Forgotten Ledger — Uncover Mackinac's Lost Trade Secret
📍 Mackinac Island, Michigan·🕐 2h30 – 3h·📍 ~2.5 km
Also available as:HistoricalMysteryRomanceFairy tale

The Forgotten Ledger — Uncover Mackinac's Lost Trade Secret

Decipher a hidden merchant's ledger to expose the truth behind Mackinac Island's fur trade fortune and the conspiracy that buried it.

📱 1 to 10 phones · 1 team per phone · Independent codes

Difficulty
·From age 12 years
Starting point :Mackinac Island Visitor's Center, Main Street

In the shadow of Fort Mackinac, a scandal was erased

8
stages
~2.5 km
route
2h30 – 3h
at your pace
🚶
walking

The Forgotten Ledger — Uncover Mackinac's Lost Trade Secret

🎭Your Mission

You are Lewis Cass, Michigan Territory Governor in 1820, on a mission to consolidate American commercial interests on Mackinac Island, a strategic crossroads of the Great Lakes.

Your quest: to find

Uncover Mackinac Island's commercial past, from 19th-century traders to Fort Mackinac's military secrets that shaped Michigan.

Far more than an escape game

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.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

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?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

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.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

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

Visit Fort Mackinacoptional
Paid admission. Explore the fort's ramparts and buildings for a complete immersion in Mackinac Island's military and commercial history.
Optionnel
/pers.
Explore the Dr. William Beaumont Museumoptional
Paid admission. Discover Dr. Beaumont's pioneering work on human physiology, a vital part of Michigan's scientific history.
Optionnel
/pers.
Mackinac Island Fudge Tastingoptional
Variable price. Taste Mackinac Island's famous fudge, a gourmet tradition dating back to the island's early tourism.
Optionnel
/pers.
Visit Arch Rockoptional
Free access. Admire this 146-foot-high natural geological formation, a historic landmark for commercial navigation on the Straits of Mackinac.
Optionnel
/pers.
Budget if you do them all / pers.~0

The story that haunts this land

Your investigation begins on Main Street, the commercial heart of Mackinac Island, established in the 19th century as a center for trade and commerce. By 1875, this street was already bustling with shops and galleries, reflecting the island's flourishing tourist and mercantile economy. As Lewis Cass, you examine the historic facades, searching for clues left by former merchants. It is here, the official starting point for guided tours, that the first leads to the Forgotten Great Ledger are revealed, hidden in architectural details or period signs. The history of Mackinac Island's commercial transactions comes alive before your eyes.

Continue towards Fort Mackinac, a military fortification built in 1780-1781 by the British, located 320 feet above Mackinac Island. This site strategically controlled the Straits of Mackinac and Great Lakes trade routes from the 18th century. As governor, you understand the military importance of this site for the island's possession and trade regulation. The fort, now a Michigan State Museum, documents the region's military, commercial, and civil history, offering insight into the power struggles that marked Mackinac Island. Archival documents here could reveal crucial information about past trade agreements.

Your journey leads you to the Dr. William Beaumont Museum, dedicated to this revolutionary military physician (1785-1853) stationed at Fort Mackinac. Between 1822 and 1833, Beaumont conducted pioneering studies on human digestion, fundamental to modern physiology. The preserved historic building documents these 19th-century scientific and medical contributions. While the focus is on medicine, records of provisions or military correspondence might contain indirect information about Mackinac Island's commercial flows and influential figures of that era, clues for your quest.

Exploring the Richard and Jane Manoogian Mackinac Art Museum, located in a historic residence, you discover a collection of American art reflecting the cultural and artistic history of the Great Lakes region. This stop allows you to appreciate the island's cultural and commercial heritage from another angle. The artworks and documents displayed could depict scenes of mercantile life or portraits of key figures linked to Mackinac Island's trade, offering unexpected perspectives on the secrets of the Forgotten Great Ledger. Every painting, every art object, is a window into the past.

Your journey concludes at Marquette Park, a historic public space named in honor of Father Jacques Marquette, a 17th-century Jesuit explorer. This park is a historical gathering place and an observation point for the Straits of Mackinac and its trade routes. It is here, facing the expanse of the Great Lakes, that you piece together the puzzle. Information gathered on Main Street, at Fort Mackinac, and through the museums connects, revealing the true scope of the Forgotten Great Ledger and the commercial influences that forged Mackinac Island, a pillar of Michigan's heritage. You leave with a deep understanding of the island's history.

1780
Construction of Fort Mackinac begins by the British to secure the fur trade.
1812
Capture of Fort Mackinac by the British at the start of the War of 1812, a crucial turning point for the island.
1834
John Jacob Astor sells his interest in the American Fur Company, signaling the decline of the golden age of fur trade.

The Route

8 stages through the city

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

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.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

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.
🕒No date to pick · Code valid 1 year · Play whenever you want

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

Starting point
Mackinac Island Visitor's Center, Main Street
Directions on Google Maps
🕐
Duration
2h30 – 3h
At your own pace
👥
Players
Unlimited
From age 12
📍
Distance
~2.5 km
Historic center and park
Accessibility
Partial
Uneven paths, slopes
🌐
Languages
17 languages
Built-in translation

Why this route?

👻

Island Legends

Delve into the ghost stories and unexplained events that haunt Mackinac Island's historic sites.

⚔️

Colonial Fort

Explore the military legacy of American and British conflicts surrounding Fort Mackinac.

🦌

Fur Trade

Reconstruct the economic and cultural importance of the fur trade that shaped the island's destiny.

History Whispers

Decipher the ledger, pierce the mist.

★ Innovation 2026

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

Uncover Mackinac Island's commercial past, from 19th-century traders to Fort Mackinac's military secrets that shaped Michigan.

12€
1 phone
23€
2 phones
33€
3 phones
42€
4 phones
50€
5 phones
56€
6 phones
62€
7 phones
68€
8 phones
74€
9 phones
80€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 12€

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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