c. Sofiya. Municipality Sofiya. State Sofia.
The Boyana waterfall is the most beautiful and the biggest waterfall in Vitosha mountain and has the hight of 15 meters. The waterfall is especially beautiful during the spring when it is high-water. Boyana is located 7,5 km on north from the city of Sofia, in the foots of Vitosha mountain, and since 1961 is a district of Sofia.