The Struma or Strymónas (Bulgarian: Струма [ˈstrumɐ]; Greek: Στρυμόνας [striˈmonas]; Turkish: (Struma) Karasu [kaɾaˈsu], ‘black water’) is a river in Bulgaria and Greece. Its ancient name was Strymṓn (Greek: Στρυμών [stryˈmɔːn]). Its drainage area is 17,330 km2 (6,690 sq mi), of which 10,797 km2 (4,169 sq mi) in Bulgaria, 6,295 km2 (2,431 sq mi) in Greece and the rest in North Macedonia. It takes its source from the Vitosha Mountain in Bulgaria, runs first westward, then southward, forming a number of gorges, enters Greek territory at the Kula village.
Source: Wikipedia
