Explore the Tuida Fortress, comprised of a late Roman, early Byzantine and Medieval Bulgarian fortress, located on the Hisarlaka Hill in Sliven. It's a must see attraction offering plenty of activities inside. Use your tickets to enter the grounds and walk at your own pace or upgrade to enjoy a guided tour, archery and medieval dress.

Explore the archaeological excavations that have revealed the fortress walls of Tuida, towers and gates, remains of buildings, two marble pedestals dedicated to gods Apollo and Zeus, a 3rd century AD inscription describing the settlement as a market place, cult complex used between the 4th and the 13th century and a unique baptistery decorated with murals and mosaics.