• Marktplatz - Begin your adventure at the Marktplatz, located in the heart of the old town. Open the Explorial app, input the 6-digit game code received via text and Viator chat message, and start your journey. This tour is entirely self-guided — no guide, no set start time, just your group exploring the city.

The St. Ursen-Kathedrale stands majestically over the initial puzzles: constructed in eleven years, featuring eleven altars, eleven bells, and a staircase with steps in multiples of eleven — showcasing Solothurn’s lucky number in full baroque splendor.

At the Rathaus, decipher a facade where Gothic turrets blend with Renaissance staircases — a structure that took three centuries to reach its current form.

The Märetplatz unites the old town beneath the Zytglogge tower, whose astronomical clock has kept Solothurn on time since the 16th century.

The tour lasts approximately 2 hours, accommodates any group size, and is available in English, German, French, Italian, Spanish, and Portuguese.

By the conclusion, you’ll find yourself checking every fountain and chapel for the number eleven.

• Free download of the Explorial App from your appstore (iOS or Android smartphone required)
• Points and scoring system: Compete between players of your group and beat the cities high score.
• Live Location: navigate within the map with marked locations. Always know where you are.
• Learn about the cities stories, history, and local legends
• Total flexibility: no waiting, start anytime, walk at own pace and do as many breaks as you want.
• Self-guided walking tour with interactive riddles, trivia challenges and photo tasks.

• Live-Guide: 100% self-guided; no one will meet you or join your group. Start anytime you want.
• Entrance fees are not required for this game. All puzzles relate to the public areas of the sights
• This is not an audio guide but an sightseeing, gaming and learning experience

Solothurn has a fascination with the number eleven, featuring eleven churches, eleven fountains, eleven chapels, and a cathedral with eleven altars and eleven bells. This trail allows visitors to count them all.

This app-guided scavenger hunt takes participants on a walking tour of Solothurn, using phone-based riddles to navigate from one landmark to another. There is no guide and no set start time.

• Ascend the steps of the St. Ursen-Kathedrale, a baroque masterpiece constructed around the magical number
• Unravel the mysteries of the Rathaus, an eclectic blend of Gothic and Renaissance architecture
• Traverse the Märetplatz, home to an astronomical clock tower

The app is available in 24 languages, including English, French, German, Spanish, and Italian. The full list is available upon booking, and participants can select their preferred language when starting the game in the app.

The experience lasts approximately 2 hours and accommodates any group size.

By the final riddle, visitors will find themselves spotting elevens throughout Switzerland’s most stunning baroque town.

• Max 15 people per booking. For larger groups, make multiple bookings.
• After booking you receive a text message and a Viator message with your game code. Download the Explorial app from your appstore. Open the app, enter your 6 digit game code
• Weather & Health Guarantee: If bad weather or illness prevents you from starting the tour, you can simply reschedule it for another day. You can also rebook to a different city or request a refund
• Smartphone required: Bring your own fully charged smartphone with an active mobile data connection to the start of the tour. Please disable any VPN and avoid city Wi-Fi, as these will cause the app to malfunction or disconnect.
• Recommended attire: It’s best to wear weather-appropriate clothing and comfortable walking shoes — approx. 2 hours of light walking

For a full refund, cancel at least 24 hours before the scheduled departure time.