Black Lake Falls (Polish: Czarnostawiańska Siklawa) is a waterfall located in the Tatra National Park, High Tatras, Poland, dropping a total of approximately 40 metres (130 ft). The waterfall has been formed on the Black Lake Stream (Polish: Czarnostawiański Potok) in the Rybi Potok Valley and flows out of Lake Czarny Staw pod Rysami located over Lake Morskie Oko. The waterfall falls down in two main cascades, the upper one lies at 1,570 metres (5,150 ft) above sea level while the lower one is at 1,460 metres (4,790 ft).