WATERS
   The ridge of the Balkan Range is the main watershed between the Black Sea and the Aegean. To the North, towards the river Danube and the Black Sea flow the rivers Vit, Osam and Rossitsa, while to the South, towards the Aegean, rush the Topolnitsa, the Stryama and the Tundja.
   The deep karst bedrock provides a steady outflow of the underground aquifer feeding those rivers, and the sprawling old forests retain the topsoil moisture. The riverbeds are steep, the rivers are fast and abundant in water.
    At many places these rivers jump off high cliffs, forming scenic waterfalls, which the local population calls praskala, or spray gushers. Central Balkan is the scene of some of the highest and most impressive waterfalls in Bulgaria, notably Raiskoto Praskalo (124.5 m.), Vidimskoto Praskalo (80 m.) and Kademliiskoto Praskalo (72 m.).
    The gross average annual outflow of all water streams generated in the territory of Central Balkan National Park is 460 million cubic meters; however, this may drop to 290 million cubic meters on a dry year, or rise to 530 million cubic meters on a rainy year.
   The local water is of very high quality and makes up a large portion of the drinking water resources of Bulgaria.

From the Paradise rocks in the Central Stara planina descends the highest waterfall in Bulgaria – Raiskoto praskalo.

The waterfall of Kademliiskoto praskalо is one of the marvelous creations of nature that takes your breath away.

Situated in the northern part of the biosphere reserve of Severen Djendem in Stara planina mountain, the Vidima Waterfall impresses with its enchanting beauty and majesty.

Tundja river springs from the central parts of the Stara planina mountain. It is the biggest tributary of Maritsa river, and its total water area is 7880 sq. km.

It is not so high like the others in the National Park of Central Balkan, but it is just as beautiful as the others are.

Cherni Osam River, which is considered the source of the Osam River, starts from the western part of the Troyanski Balkan, southwest from mountain peak Levski.

Because of its waterfalls, rapids and rocky gorges the river is labeled as the most spectacular river in Bulgaria with a total length of 37 km and a catchment area of 239 sq. km.

Golyama Bazovitsa River takes its source from the region of the Marinka shelter (on the eastern slopes of Botev Peak) and flows through the breathtaking rocks above Rogachevara Pestera Cave.

The largest river in the region of Apriltsi town is Vidima River, taking its source from the peak of Botev. In the region of the Mazaneto site, the water is channeled and brought to the Vidima water power station.

Kostina River is a tributary to Beli Vit river, flowing into in Ribaritsa village. It originates from the main crest of the mountain – the peaks of Bratanitsa and Bulovanya.