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Uncover the buried secret of George Washington's hidden heir among the estate's landmarks. Decode clues from the mansion to the Slave Memorial to expose a forgotten legacy before it vanishes forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
At Mount Vernon, George Washington's grand estate overlooking the Potomac, a chilling discovery shakes the foundations of American history
You are Lawrence Lewis, George Washington's nephew, tasked in the early 19th century with uncovering a long-held family secret at Mount Vernon.
Your quest begins at the panoramic Overlook of
Uncover the past of Mount Vernon, Virginia, tracing a forgotten legacy from wartime fortifications to colonial estates.
Your adventure in Mount Vernon begins on the George Washington Memorial Parkway, a 7,142-acre scenic parkway established in 1930 to connect Mount Vernon to Washington, D.C. This National Scenic Byway, designated in 2007, offers overlooks with views of the Potomac River. Near the Fort Hunt Overlook, you access trails that are integral to the Mount Vernon Trail system. It is here, facing the expanse of Virginia, that the first enigma sets you on the trail of secrets buried by your uncle, George Washington, the first President of the United States and owner of the famous Mount Vernon Estate.
The route then takes you to Fort Hunt Park, built in 1897 as Battery Rodgers during the Spanish-American War. Its two 12-inch guns could fire 1,000-pound shells over 12 miles. From 1942-1945, the site was used during World War II for secret coastal defenses and POW interrogations at Camp Hoffmann. Added to the National Register of Historic Places in 1974, Fort Hunt Park still features gun emplacements and underground magazines visible today. These military remnants, located near Alexandria, conceal clues that only a keen eye can decipher.
Walking alongside the Dyke Marsh Wildlife Preserve, a 1,235-acre tidal marsh preserve established in 1966, you discover the largest freshwater tidal marsh remaining in the urban Washington region, supporting over 350 bird species. Boardwalk trails accessible from the Mount Vernon Trail, part of the Potomac Heritage National Scenic Trail, offer an immersive break. This Mount Vernon Trail, an 18.4-mile multi-use trail opened in sections starting 1972, parallels the George Washington Parkway from Arlington to George Washington's Mount Vernon with an elevation change of only 400 feet. Over 2 million visitors use it annually, but few know the hidden messages along its banks.
Your quest leads you to Pohick Church, an Episcopal church constructed 1769-1774, attended by George Washington, who was a vestryman from 1762-1783, and George Mason. The only colonial-era church remaining in Fairfax County, its steeple was rebuilt in 1891 after hurricane damage. Washington's pew, with a family Bible from 1773, is preserved. Designated a Virginia Historic Landmark in 1968, Pohick Church is a key location where your uncle's legacy secrets might be inscribed in stone. Nearby, Woodlawn & Pope-Leighey House, properties managed by the National Park Service, reveal other chapters of Mount Vernon's history. Woodlawn, a plantation house built 1800-1802 by Lawrence Lewis himself on 2,000 acres gifted from the Mount Vernon estate, and the Pope-Leighey House, designed by Frank Lloyd Wright in 1940 and relocated to the site in 1964, illustrate architectural evolution and the life of Virginia's elite.
At the end of the journey, after exploring the Alexandria National Cemetery and the George Washington Masonic National Memorial, you will have assembled the puzzle pieces. This thematic circuit in Mount Vernon, Virginia, will have allowed you to visit major monuments and historic sites such as Fort Hunt Park, Pohick Church, and Woodlawn, all designated National Historic Landmarks or listed on the National Register of Historic Places. More than a simple visit to Mount Vernon, this exploration offers a deep understanding of the region's heritage, from key dates in the founding of the United States to personal narratives of the figures who shaped Virginia's history. You carry with you the feeling of having uncovered the mysteries of a forgotten legacy, revealing unexpected facets of American history.
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
5-10 curated sites across the territory
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.
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Uncover hidden clues about a secret project by George Washington.
Explore the panoramas that shaped the first president's vision.
Decipher symbols carved in the stone of historic buildings.
History is a river, and we are its navigators.
Uncover a founding father's secret.
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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Uncover the past of Mount Vernon, Virginia, tracing a forgotten legacy from wartime fortifications to colonial estates.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.

30$. Explorez la maison de George Washington, construite à partir de 1758, et son domaine de 500 acres avec 8 000 pieds de façade sur le Potomac. La tombe de Washington y a été achevée en 1831.

Location vélo ~25$. Parcourez les 18,4 miles de ce sentier multi-usage, ouvert en sections depuis 1972, qui longe la George Washington Parkway et connecte directement à Fort Hunt Park et Dyke Marsh.
Variable. Découvrez les vins primés de la région de Virginie, connue pour ses domaines viticoles historiques et ses paysages vallonnés.

15$. Admirez cette maison de 2 600 pieds carrés conçue par Frank Lloyd Wright en 1940, et déplacée sur le site de Woodlawn en 1964, illustrant le design innovant Usonian.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.