The Black Drin or Black Drim (Albanian: Drini i Zi; Macedonian: Црн Дрим, romanized: Crn Drim), is a river in North Macedonia and Albania. It flows out of lake Ohrid in Struga, North Macedonia. It is 149 km (93 mi) long and its drainage basin is 3,504 km (1,353 sq mi). Its average discharge is 118 m/s (4,200 cu ft/s). After flowing through North Macedonia for 56 km (35 mi), the Black Drin crosses the border to Albania, west of Debar. It merges with the White Drin in Kukës to form the Drin, which flows into the Adriatic Sea. It drains most of the eastern border region of Albania.
At 285 kilometres (177 miles) long, the Drin is the longest river of Albania and its tributaries cross through both Kosovo and North Macedonia. Its northern tributary, the White Drin starts from the foothills of Žljeb, at White Drin Waterfall in west Kosovo, and flows generally south, whereas its southern tributary, the Black Drin originates from Ohrid lake in the town of Struga, North Macedonia and flows north. Both tributaries' confluence occurs near Kukës in northeast Albania and Drin then flows westwards through the Albanian Alps and Dukagjin Highlands, where three successive dams were erected between 1960s and late 1980s, forming 3 large artificial lakes. The Drin then passes Vau i Dejës and drains into the Adriatic Sea through its two distributaries in Buna river and west of Lezhë.
A cave monastery is a monastery built in caves, with possible outside facilities. The 3rd-century monk St. Anthony the Great, known as the founder of Christian monasticism, lived in a cave.