Saeva Dupka Cave’s five halls and 400 metres of corridors offer some of the most beautiful cave formations in the country. The cave has hosted many choral music performances, thanks to the excellent acoustic conditions. Saeva dupka was named after two brothers, Seyu and Sae, who used it as a hiding place during the Ottoman occupation of Bulgaria. Recent excavations have shown the cave was inhabited since Roman times. Saeva dupka is one of the 100 Tourist Sites of Bulgaria.

Ledenika is a cave in the Northwestern parts of the Balkan Mountains, 16km away from the Bulgarian town of Vratsa, its entrance being at 830m above sea level. It features an abundance of galleries and impressive karst formations including stalactites and stalagmites, dating back a thousand years. The cave is about 300m long and contains ten separate halls. The biggest one is the Concert Hall. The way to it is through the Passage of Sinners. Only those whose heart is pure can pass through it. Once the cave was full of water but now only a small lake has remained - the Lake of Wishes. The legend says that if you dip your hand in the ice-cold water of the lake and make a wish, the wish will come true.