photo: Nenad Golubovic

The Sićevo Gorge (Latinized: Sićevačka klisura; Serbian: Сићевачка клисура), a river gorge in Nišava District, Serbia, is the most prominent geological feature formed by the Nišava River. The gorge is located between Bela Palanka and Niška Banja; it is 17 km long, 350–400 m deep, in some parts developing canyon-like structures (including the inverse valley slopes at Gradiški kanjon; Cyrillic: Градишки кањон).