Thisavros lake, reservoir in Greece

Thisavros lake is a large reservoir in northeastern Greece created by a dam over 170 meters (560 feet) high on the Nestos River. The water covers a wide area and serves to irrigate approximately 81,000 hectares of farmland while generating electricity through three turbines.

The dam was built between 1986 and 1996 by the Greek government and stands as the tallest dam in Greece. Its construction enabled control of water flow from the Nestos River and transformed regional agriculture and power generation.

The reservoir takes its name from the abandoned village of Chereshovo, submerged when the dam on the Nestos (Mesta) was built. Downstream lies a second reservoir, Olsko Lake, fed by the same river. The artificial lake covers about 20 km² in the Drama regional unit of Greek Macedonia.

The reservoir lies in the Drama regional unit, on the Nestos (Mesta) river, and is reached by local roads; the dam crest and the shores near the village of Cherešovo offer the main viewpoints. The lake stretches 32 km in length and 320 to 2,700 m in width, so distances along the shore are long.

The lake takes its name from the abandoned village of Chereshovo, submerged when the dam on the Nestos (Mesta) was built. The reservoir covers 20 km², and the hydroelectric station's three units have a combined capacity of 384 MW. Just downstream lies a second reservoir, Olsko Lake.