Pernik is an industrial town in western Bulgaria situated 18 miles from the national capital Sofia. Explore the history of mining in Pernik at the Starite Rudnitsi, the underground mines that were in operation till 1966. The underground museum chronicles the work of miners, their living conditions among others. Take part in the Surva Carnival, an annual event featuring a magnificent display of masked Kukeri dancers in traditional costumes. The carnival is a tribute to the ancient Thracian culture that once inhabited the area. The carnival takes place in January.