The Ledenika cave is one of the most visited ones in Bulgaria. It’s fully operating during the whole year and its located 16km away from Vratsa. The cave is 320m long and it has 10 hales. In the first hall the temperature drops to -20 degrees and it forms ice column. This is a phenomenon because the temperature in the cave is permanent it is about 8-16 degrees. The humidity  is 92%. Ledenika has one of the most beautiful hales and cave formations – “The well of wishes”, “The walk of the sinners” and etc. The concert hall has amazing acoustic and is commonly used for symphony concerts.