The Carillon's Cipher — Decode Jacob van Eyck's Hidden Message
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💡City Pass from 19€All games in Utrecht
Utrecht, NetherlandsThe Carillon's Cipher — Decode Jacob van Eyck's Hidden Message
📍 Utrecht, Netherlands·🕐 2h – 2h30·📍 ~2.5 km
Also available as:HistoricalMysteryRomanceSupernatural

The Carillon's Cipher — Decode Jacob van Eyck's Hidden Message

Decipher the secret code hidden in Jacob van Eyck's carillon melodies. A 17th-century musical cipher holds the key to a forgotten conspiracy at Utrecht's Dom Tower.

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

Difficulty
·From age 10 years
Starting point :Domplein (Dom Square), Utrecht

Utrecht, 1660s

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

The Carillon's Cipher — Decode Jacob van Eyck's Hidden Message

🎭Your Mission

You are a dedicated scholar of the Utrecht Academy, 1658, specializing in the musical innovations of Jacob van Eyck.

You are investigating an encrypted manuscript discovered in the Domkerk

Follow the musical traces of Jacob van Eyck, recorder virtuoso who revolutionized street music in 17th-century Utrecht.

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

Central Museum (Centraal Museum)optional
€16. Utrecht's largest Dutch art collection, featuring Renaissance musical instruments and 17th-century portraits contemporary to Jacob van Eyck.
Optionnel
/pers.
Dom Tower Climboptional
€12. Guided climb of 465 steps to the top of the Netherlands' tallest medieval tower, with panoramic view of the 49-bell carillon.
Optionnel
/pers.
Tasting at Café Ledig Erfoptional
€25. Utrecht craft beers in a historic café in the cathedral quarter, with traditional Dutch specialties and 17th-century atmosphere.
Optionnel
/pers.
Carillon Concert (summer season)optional
Free. Weekly concerts on the Dom Tower carillon on Saturday afternoons, perpetuating the musical tradition inaugurated by Jacob van Eyck in the 17th century.
Optionnel
/pers.
Budget if you do them all / pers.~0

The story that haunts this land

Utrecht still resonates with the melodies of Jacob van Eyck, composer and carillonneur who transformed the Dom Tower into a giant instrument between 1625 and 1657. Born around 1590, this recorder virtuoso revolutionized Dutch street music by creating 'Der Fluyten Lust-hof', the first European collection dedicated to variations for solo flute. On Domplein, the central square since the 13th century, you discover the urban theater where van Eyck gave his improvised concerts, transforming public space into an open-air concert hall.

The Dom Tower, built between 1321 and 1382, rises 112.5 meters above Utrecht as the tallest medieval belfry in the Netherlands. Jacob van Eyck served there as carillonneur and carillon technician from the 1620s, mastering the 49 bells reconstructed in the 16th century. Daily, his compositions resonated throughout the cathedral quarter, creating a unique sonic identity that distinguished Utrecht from other Dutch cities of the era.

In the Dom Cathedral, a Gothic church built between 1254 and 1517, van Eyck developed his recorder art in service of Reformed liturgy. This 109-meter-long cathedral served as an acoustic setting for his musical experiments, where he fused Dutch popular traditions with Italian Renaissance innovations. The adjacent Pandhof, a Gothic cloister from the 14th-15th centuries, preserves the contemplative atmosphere where the composer circulated daily.

The Academy Building, seat of Utrecht University founded in 1636, testifies to the intellectual effervescence that accompanied van Eyck's artistic peak. Nearby, the 14th-century Paushuize and Saint John's Church at Janskerkhof (1423-1520) complete the urban landscape where the musician evolved. These Renaissance and Gothic buildings formed a natural acoustic network, allowing van Eyck's melodies to propagate from one monument to another.

Zocherpark, landscaped in the 19th century on Utrecht's former public gardens, preserves the memory of Jacob van Eyck's musical evenings. Here, between 1640 and 1657 according to archives, the master played recorder for strollers, creating this unique tradition of outdoor concerts that influenced all Dutch musical culture. In 2023, the underground passage beneath the Dom Tower was renamed 'Jacob van Eyck Passage', definitively consecrating his legacy in Utrecht's heritage.

1321
Start of the construction of the Dom Tower, architectural symbol of Utrecht.
1636
Founding of Utrecht University, which quickly became a center of knowledge and influence.
1657
Death of Jacob van Eyck, carillonneur of the Dom Tower, leaving behind his musical legacy and a secret.

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
Domplein (Dom Square), Utrecht
Directions on Google Maps
🕐
Duration
2h – 2h30
At your own pace
👥
Players
Unlimited
From age 10
📍
Distance
~2.5 km
Historic center
Accessibility
Partial
Cobblestones and some stairs
🌐
Languages
17 languages
Built-in translation

Why this route?

🎼

Secret Melody

Decipher an ancient musical score left by the carillonneur Jacob van Eyck.

🛡️

Forgotten Brotherhood

Uncover the symbols and secrets of a discreet Utrecht guild or society.

17th Century

Immerse yourself in Utrecht's Golden Age, an era of science, art, and hidden mysteries.

The secret of the bells awaits to be revealed.

Listen to the echoes of the past.

★ 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

Follow the musical traces of Jacob van Eyck, recorder virtuoso who revolutionized street music in 17th-century Utrecht.

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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