Ville Haute — Voices of Silence
Uncover the silenced voices of Luxembourger youths forcibly conscripted by Nazis. Decode secret messages at WWII monuments to reveal a hidden journal exposing their tragic fate.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the shadows of Ville Haute, Luxembourg City's historic upper town, the Nazi occupation forced thousands of young Luxembourgers into the Wehrmacht as 'Ons Jongen'
Ville Haute — Voices of Silence
You are Charlotte of Luxembourg, Grand Duchess from 1919 to 1964, returning to Luxembourg City in 1945 to trace the voices silenced by occupation
Delve into the layers of Luxembourg's Ville Haute, where every stone whispers echoes of past resistances, from the Middle Ages to World War II.
« We now want the city against everyone. »— Motto of the City of Luxembourg
The story that haunts this land
Your journey begins in Place de la Constitution, developed in 1923 to commemorate Luxembourgish soldiers of the 1914-1918 war. Here stands the Monument of Remembrance, the Gëlle Fra, a 28-ton statue erected in 1923, depicting a winged woman brandishing a laurel wreath. Its total height of 25 meters makes it an immediate visual landmark. Inaugurated on May 27, 1923, by Grand-Duke Adolphe de Nassau, it was destroyed by the Nazis in 1940, then rebuilt identically in 1985. It is a Luxembourgish historical monument, a symbol of resistance and a UNESCO World Heritage site in Luxembourg's Ville Haute.
Not far, your gaze turns to the Cathédrale Notre-Dame de Luxembourg, a building constructed between 1613 and 1622 as a Jesuit church, before being elevated to cathedral status in 1870. With a length of 54 meters and a capacity of about 1,200 faithful, it is a pillar of Luxembourgish heritage. In its underground chapel lies the tomb of Jean de Luxembourg (1296-1346), King of Bohemia, a historical figure whose presence anchors the cathedral in deep medieval history. A visit to Luxembourg thus reveals layers of history at every step.
Your path then leads you to the Palais Grand-Ducal, official residence of the current Grand-Duke Henri de Luxembourg since 1890. Built between 1572 and 1578 as a town hall, it was occupied by the Nazis from 1940 to 1944, transformed into an administrative HQ. This Luxembourgish historical monument offers 25 rooms open to the public during summer guided tours since 1974. The Palace embodies dynastic continuity and resilience in the face of occupation, a key site for understanding the history of Luxembourg and its thematic circuit.
Continue your exploration towards the Casemates du Bock, a UNESCO classified site since 1994. This 4 km underground gallery was dug from 1644 by the Spanish Vauban. In the 18th century, it could house 10,000 men and 50 cannons, testifying to the power of the Luxembourg fortress. Closed to the public from 1940 to 1944 during the occupation, they reopened in 1950, becoming a symbol of rediscovered freedom and an essential part of the UNESCO World Heritage of the Ville Haute. This walk in Luxembourg is a dive into the city's memory.
Finally, the Chemin de la Corniche, dubbed 'Europe's most beautiful balcony' since the 1930s, offers a view over a 40-meter drop to the Alzette valley. Restored in 1986 after a partial collapse in 1985, this 1.2 km promenade is a strategic viewpoint. The Statue of Grand Duchess Charlotte, a work by René D'Huart inaugurated on June 23, 1990, on the Place de la Constitution, overlooks this perspective, marking the end of your exploration of Luxembourg's silent voices. This interactive visit to Luxembourg leaves you with a deep understanding of its history and identity, a truly enriching thematic circuit.
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.
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. »
How does it work?
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.
The game downloads to your phone on start. Once the "✓ Downloaded" indicator appears, everything works without data — narration, AR, GPS and puzzles. Perfect abroad without a data plan.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
The Route
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.
How does it work with a group?
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.
- ✓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.
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
Why this route?
Memory of the Conscripts
Follow in the footsteps of the 'Ons Jongen' and give a voice back to those whose destinies were broken by history.
Secret Messages
Intercept hidden communications, written in haste, that tell an unspeakable truth.
Places of Remembrance
Explore emblematic sites where the memory of resistance and sacrifice is still palpable.
Their broken voices, our duty to remember.
An eternal tribute.
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
Q01What's the difference with a regular indoor escape room?
Outdoor escape game format: no physical locks, no actor, no fixed time slot. You start when you want, progress through Upper City and Pétrusse Valley with your phone, and the city itself is the set. More immersive on local history, more flexible in pace.
Q02How long does it take to finish Ville Haute — Voices of Silence?
Plan 1 h 30 to 2 h 30 depending on your pace. Some finish in 1 h 10, others take 3 h in slow-mode. No pressure: the clock only counts for the leaderboard, you play at your tempo.
Q03Do we need to be several people to enjoy it?
No, solo works very well. The outdoor escape game format in self-guided mode leaves room for introspection: read the story at your pace, hunt clues like a detective. 2-6 players is more social, solo is more contemplative.
Q04What happens if it rains in Upper City and Pétrusse Valley?
The game is playable in light rain — just keep your phone under a hood. For heavy thunderstorms, your code stays valid, you can postpone to another day at no cost.
Avis des aventuriers
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Your turn to play
Delve into the layers of Luxembourg's Ville Haute, where every stone whispers echoes of past resistances, from the Middle Ages to World War II.
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
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