Fort McHenry — Key's Secret Code
From14,90€

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Baltimore, MarylandFort McHenry — Key's Secret Code
📍 Baltimore, Maryland·🕐 5h – 8h·📍 ~40-60 km en voiture
🚗Roadtrip · Car needed
Also available as:HistoricalMysterySupernaturalSpy thriller

Fort McHenry — Key's Secret Code

Uncover the hidden code in Francis Scott Key's poem that reveals a traitor who nearly betrayed Fort McHenry during the 1814 bombardment. Decipher clues across the battleground to expose the culprit.

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

Difficulty
·From age 10 years
Starting point :Federal Hill Park, 300 Warren Ave, Baltimore, MD 21230

September 1814: British rockets rain down on Fort McHenry as Baltimore fights for survival in the War of 1812

2–4
days at your pace
🚗
car · 5-30 km between sites

Discover Baltimore, the city that inspired the American anthem, through an immersive journey at the heart of its War of 1812 heritage.

Step into the shoes of Francis Scott Key, the lawyer-poet who penned 'The Star-Spangled Banner' in 1814, as you seek to decipher a secret code left within the city of Baltimore. Your mission begins at Federal Hill Park, offering panoramic views of the Inner Harbor and Fort McHenry, a Union troop observation point in 1861. Over a 1.5 km route, lasting approximately 135 minutes on foot, you will explore Maryland's heritage. At each stop, open your phone: augmented reality clues will appear on historical facades and monuments dedicated to the War of 1812. A coded message will emerge on Fort McHenry's walls, golden letters will write themselves on Mary Pickersgill's flag stars, the genius of the Battle Monument will whisper the names of fallen heroes. More than an outdoor escape game: an interactive tour immersed in 200 years of history, with anecdotes revealed at each stop and confidential sites that classic guides overlook.

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

Baltimore Museum of Artoptional
Free entry. Admire the world's largest public collection of Henri Matisse works.
Optionnel
/pers.
B&O Railroad Museumoptional
$20. Explore the birthplace of American railroading and its historic collection of locomotives.
Optionnel
/pers.
Crab Cake Tastingoptional
Various prices. Taste Maryland's culinary specialty, the famous crab cake, at a local Baltimore restaurant.
Optionnel
/pers.
National Aquariumoptional
$39.95. Dive into marine ecosystems from around the world, from coral reefs to rainforests.
Optionnel
/pers.
Budget if you do them all / pers.~0
« O say can you see, by the dawn's early light »
Francis Scott Key, 'The Star-Spangled Banner', 1814

The story that haunts this land

Your quest begins at Federal Hill Park, a historic site designated in 1970, whose summit rises 52 feet above sea level. This public park, established in 1948, served as a crucial observation point for Union troops in 1861, monitoring Confederate movements with strategic clarity. From here, you gaze upon Baltimore and its Inner Harbor, a prelude to the city's maritime history. The panorama prepares you to understand the stakes of Baltimore's defense during the War of 1812, and how this hill played a role in monitoring threats.

Continue towards the Inner Harbor, a historic seaport, once central to Baltimore's 19th-century maritime trade. In the 1830s, it handled over 50% of U.S. overseas commerce, and was dredged to a 50-foot depth in 1980. This is where the USS Constellation, launched in 1797, is located. As you stroll along these docks, you traverse Baltimore's economic history, a city that has always been a gateway to the world. The port, vital for defense and supply, is a reminder of Baltimore and Maryland's strategic importance in American history.

Your journey then leads you to the Star-Spangled Banner Flag House, at 844 East Pratt Street, opened as a museum in 1953 and designated a National Historic Landmark in 1971. This was the home of Mary Pickersgill, who sewed the 30x42-foot garrison flag for Fort McHenry in 1813. This flag, originally measuring 102 feet long, with 15 stars and 15 stripes, flew over the fort, inspiring Francis Scott Key. Visiting this house immerses you in the meticulous work that preceded the battle, a testament to the civic engagement and patriotism of the era in Baltimore.

The Battle Monument, erected between 1815 and 1829 in Battle Monument Square, commemorates the War of 1812 Battle of Baltimore. This 93-foot column, sculpted by J. Maximilian Godefroy, is the oldest monument in the U.S. dedicated to this war and lists 39 officers killed or wounded. This historic site, integrated into the War of 1812 heritage trail, reminds you of the sacrifice and bravery of Baltimore's defenders. Each name engraved on the monument is a piece of the historical puzzle you are assembling, a key stop on the Star-Spangled Banner National Historic Trail.

Finally, your journey brings you to Fort McHenry National Monument and Historic Shrine, built between 1798 and 1803 as a coastal fortification. This star-shaped pentagon fort, covering 43 acres with walls 30 feet high and 20 feet thick at its base, withstood British bombardment on September 13-14, 1814, during the Battle of Baltimore, inspiring 'The Star-Spangled Banner'. Designated a National Monument in 1925 and managed by the National Park Service, it embodies Baltimore's resilience. Walking its walls, you understand the determination of George Armistead, the fort's commander, and the impact of this event on American national identity. This route is a true interactive tour of Maryland's heritage, an exploration of Baltimore's monuments.

1812
Beginning of the War of 1812 between the United States and the United Kingdom.
1814
Bombardment of Fort McHenry and inspiration of Francis Scott Key.
1931
« The Star-Spangled Banner » officially becomes the national anthem of the United States.

The Route

5-10 curated sites across the territory

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 · 14,90€

No calendar booking. Code sent immediately by email.

🔒 Secure payment · Code in 5 min · Free cancellation

Practical info

Starting point
Federal Hill Park, 300 Warren Ave, Baltimore, MD 21230
Directions on Google Maps
🕐
Duration
2h – 2h30
At your own pace
👥
Players
Unlimited
From age 10
📍
Distance
~2.5 km
Historic Center
Accessibility
Partial
Slopes in Federal Hill
🌐
Languages
17 languages
Built-in translation

Why this route?

📜

Forgotten Manuscript

Uncover the secrets of Key's original writings.

On the Trail of the Blockade

Explore the strategic locations of Baltimore Harbor.

🌟

The Birth of a Symbol

Discover the story behind the American national anthem.

Adventure awaits

Explore, learn, have fun.

★ 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, 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

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Your turn to play

Discover Baltimore, the city that inspired the American anthem, through an immersive journey at the heart of its War of 1812 heritage.

14,90€
1 phone
28,60€
2 phones
41€
3 phones
52,20€
4 phones
62,10€
5 phones
69,50€
6 phones
77€
7 phones
84,40€
8 phones
91,90€
9 phones
99,30€
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 · 14,90€

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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