Boyana waterfall, Mountain cascade in Vitosha Nature Park, Bulgaria.

Boyana waterfall plunges about 25 meters over rocky terrain, forming a series of cascades within the dense woodland of Vitosha mountain outside Sofia. The falling water creates small pools between the stone formations as it makes its way downward.

The waterfall is formed by the Boyana River descending the northern slopes of Vitosha through an andesite belt; the resistant rock creates rapids and the 25-metre fall at 1260 m altitude. The writer Ivan Vazov dedicated a poem, "The Waterfall", to it. In 2016 a street in Sofia's Strelbishte, Gotse Delchev and Manastirski Livadi quarters was named after it.

The waterfall appears in Ivan Vazov's poem "The Waterfall", linking it to Bulgarian literary tradition. A street in Sofia's Strelbishte, Gotse Delchev and Manastirski Livadi quarters bears its name. In clear spring days the white band of water can be seen from central Sofia.

Three trailheads lead to the falls. From Boyana, the direct right-hand path is steep and icy in winter, with 460 m of ascent from the trail start and about 550 m from the Boyana square served by city transport; the route via Boyana Lake is longer but gentler. From Kopitoto (1345 m, reachable by car), the quickest route takes about an hour of walking. From Momina Skala hut the path is initially steep, then flattens.

During winter months the flowing water freezes into natural ice sculptures, transforming the cascade into a columnar formation with shifting patterns. These frozen shapes develop as the falling water meets freezing temperatures on the rocks below.