Terjevi is an artificial lake located west of the village of Terjevi, northwestern Slovenia. It was established in 1986 as a reservoir for the Mavicici hydroelectric station. It covers an area of one kilometer and reaches a depth of 17 metres. It is surrounded by steep banks, with clumps in the northern part, and is famous for its animals that Home to many fish and about 140 species of birds, it is a popular place for fishing and boating.