🕒 No date to pick · Code valid 1 year · Play whenever you want
Get my code
1897: Uncover the secret manuscript Herzl hid during the first Zionist Congress. Decode clues across Basel's Old Town to reveal a conspiracy that threatened the birth of a nation before it began.
📱 1 to 10 phones · 1 team per phone · Independent codes
In August 1897, Theodor Herzl convened the First Zionist Congress in Basel, igniting the dream of a Jewish homeland
You are a Viennese investigative journalist, operating under a secret assignment in Basel, August 1897.
You follow Theodor Herzl's traces during the three historic days of August 29
Dive into the secret corridors of Basel's Stadtcasino where Theodor Herzl organized in August 1897 the first World Zionist Congress, an event that changed the course of Jewish history.
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
« If you want the life of the Zionist Jew, you will find him in Basel. »— Theodor Herzl, Personal Diary, August 29, 1897
Basel becomes in 1897 the world capital of nascent Zionism thanks to the Stadtcasino, built between 1868-1872 by architects Stehlin and Tschudi in Italian neo-Renaissance style. Its main hall of 500 m² hosts 1,200 delegates from 17 countries to hear Theodor Herzl proclaim the necessity of a Jewish state. This Swiss historic monument classified in 1990 still resonates with the speeches that shaped the future of the Jewish people, when Herzl prophetically declared that the Jewish state would be born within fifty years.
The Grand Hotel Les Trois Rois, founded in 1682 as 'Hotel zum Drei Königen', hosted Theodor Herzl during those crucial August 1897 days. This establishment, one of Europe's oldest hotels, offered the Viennese visionary its privileged view of the Rhine from its baroque facade restored in 1820. Listed as a cantonal historic monument in 1953, the hotel preserves the memory of those nights when Herzl wrote his personal notes on secret negotiations between delegates, revealing internal tensions of the nascent Zionist movement.
Marktplatz, the central market square since the 13th century, becomes the theater of informal debates between congress attendees. Surrounded by patrician houses from the 15th-17th centuries, it hosts passionate discussions under the shadow of the Town Hall built in 1504-1512 by Hans Pernter in late Gothic style. The Justice Fountain, erected in 1573 with its 2.5 m statue, symbolizes the ideal of justice carried by these men who came to found a new chapter in Jewish history at the heart of medieval Europe.
Basel Minster, cathedral built between 1019 and 1500, dominates with its 71.9 m tower the congress deliberations. Its bells chime the opening of each session from this site where Emperor Henry II's funeral was celebrated in 1024. The cloisters housing 14th-century frescoes and Erasmus of Rotterdam's tomb testify to Basel's humanist tradition that welcomes this diplomatic revolution. Herzl himself notes in his journal the emotion of seeing the Jewish future taking shape under these millennial Gothic vaults.
Your investigation ends in the alleys of Rheingasse, Basel's oldest street mentioned since 1225, where delegates meet in half-timbered taverns from the 15th-16th centuries. These medieval houses witnessed the birth of discussions that extend official sessions, revealing the congress's true stakes. Climbing the medieval stairs to the Rhine quays, you carry away the intimate understanding of these three days that transformed a dream into a political program, making Basel the cradle of modern Zionism and a lost manuscript the key to one of the 20th century's major turning points.
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
Uncover the secret writings that founded the Zionist movement.
Follow in the footsteps of the visionary who imagined the State of Israel.
Solve the mystery of a forgotten manuscript and its hidden messages.
Uncover the founders' secret.
The fate of a nation rests in your hands.
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.
Soyez le premier à partager votre expérience.
Did you play le manuscrit oublie de herzl? Check the email you received after your game to leave a verified review.
Dive into the secret corridors of Basel's Stadtcasino where Theodor Herzl organized in August 1897 the first World Zionist Congress, an event that changed the course of Jewish history.
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 the forbidden decrees and hidden relics from the Council of Basel's clash with the Pope. Decode clues across medieval landmarks to expose the schism's ultimate secret before it's lost forever.

Decipher the cryptic code Nietzsche hid in Basel's shadows before his descent into madness. Follow his professor's paths, unlock forbidden texts, and expose the philosopher's final secret threatening to resurface.

1897: Decode the cryptic Zionist message from the First Congress balcony. Uncover Herzl's secret cipher hidden across Old Town landmarks before it's lost forever.

Decode the secret messages hidden in Renaissance manuscripts by Basel's master printers. Solve Erasmus's cipher before the Inquisition silences the truth forever.

Decipher the hidden code in Basel's legendary 15th-century Dance of Death mural before the plague's curse returns. Uncover why the city's elite commissioned this macabre masterpiece—and what they wanted buried.
More destinations, tours & urban treasure hunts across the country
Medieval city and federal capital, guardian of the bear
Where a sparkling lake meets charming old town and vibrant modernity.
UNESCO watchmaking city, between art and precision
Between lake and mountains, a Swiss medieval jewel
Between lake and mountains, the pearl of the Swiss Jura.
Switzerland's legendary birthplace
Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
15€. Collection unique d'artefacts du premier Congrès sioniste exposée depuis 1997 dans cette église des Cordeliers du XIIIe siècle transformée en musée.
5€. Gravissez les 242 marches jusqu'au sommet de la tour de 71,9 m, accessible au public depuis 1822, pour une vue panoramique sur le Rhin et la vieille ville.
25€. Embarquez pour une croisière d'1h30 sur le Rhin depuis les quais médiévaux, avec vue sur les trois pays frontaliers et commentaires historiques.
35€. Savourez la Basler Läckerli et le saumon du Rhin dans le plus ancien restaurant de Suisse, ouvert depuis 1421 sur les rives du fleuve.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.