Manicouagan Reservoir (also Lake Manicouagan) is an annular lake (ringlike lake) in central Quebec, Canada. The lake covers an area of 1,942 km², and its eastern shore is accessible via Route 389. The lake island in the centre of the lake is known as René-Levasseur Island, and its highest point is Mount Babel. The lake and island are clearly seen from space and are sometimes called the "eye of Quebec." With a volume of 139.8 cubic kilometres (33.5 cu mi), the reservoir itself is the fifth largest in the world by volume, although only 35.2 cubic kilometres (8.4 cu mi) can be used for hydro-electric power production.