• Su. SV. Kliment Ohridski - Begin your adventure at the St. Kliment Ohridski monument in the Doctor’s Garden. Launch the Explorial app, input the 6-digit game code sent via text and Viator chat, and embark on a journey through Sofia’s lush center. This tour is entirely self-guided—no guide, no set start time, just your group and the city to explore.

The Alexander Nevsky Cathedral soon dominates the skyline, with its golden and green domes topping one of the largest Orthodox churches in the Balkans. Solve riddles that delve into bells, crypts, and a nation’s gratitude.

At the Ivan Vazov National Theatre, engage in trivia in front of the ornate facade and fountain park, a popular spot for Sofia’s social scene.

Next, the Regional History Museum, located in the striped former Central Mineral Baths, offers clues about thermal springs, Serdica, and the city’s rich history.

The entire circuit takes about two hours at a leisurely pace. The final scoreboard will reveal Sofia’s ultimate explorer.

• 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

Golden domes, ancient Roman ruins beneath your feet, and the allure of the theatre district — Sofia reveals its most captivating tales to adventurers.

This app-guided scavenger hunt leads participants through Sofia on foot, utilizing phone-based riddles to navigate from one landmark to another. No guide is needed, and there is no set start time.

• Marvel at the gilded domes of the Alexander Nevsky Cathedral
• Pose in front of the Ivan Vazov National Theatre and its charming fountain garden
• Explore the Regional History Museum housed in the elegant former mineral baths

Available in 24 languages, including English, French, German, Spanish, and Italian — view the complete list when booking and select your preferred language when starting the game in the app.
Approximately 2 hours - suitable for any group size.

Bulgaria’s capital, unveiled street by street.

• 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.
• 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.