The Vorotan Cascade, or the ContourGlobal Hydro Cascade, is a cascade on the Vorotan River in Syunik Province, Armenia. It was built to produce hydroelectric power and provide irrigation water. The Vorotan Cascade consists of three hydroelectric power plants and five reservoirs with a combined installed capacity of 404.2 MW. It is one of the main power generation complexes in Armenia.

Sisian is a town and the centre of the Sisian Municipality of the Syunik Province in southern Armenia. It is located on both banks of the Vorotan River, at an altitude of 1600 m above sea level, 6 km south of the Yerevan-Meghri highway, at a road distance of 217 km southeast of the capital Yerevan, and 115 km north of the provincial capital Kapan.