Manicouagan Reservoir, Circular reservoir in Quebec, Canada.

Manicouagan Reservoir is a ring-shaped body of water covering 1,942 square kilometers (750 square miles) in Quebec, Canada, encircling Île René-Levasseur at its center. Mount Babel rises on this central island, reaching a height of 952 meters (3,123 feet) above sea level, while the water surface surrounds the mainland in a wide arc.

The crater formed 214±1 million years ago when a meteorite about 5 km across struck; the resulting structure is the Earth's sixth-largest confirmed impact crater by rim-to-rim diameter. The present reservoir was created in the 1960s, when Hydro-Québec built the Daniel-Johnson dam and flooded the earlier Lake Mushalagan to the west and the then-smaller Manicouagan to the east, part of the Manic-Outardes project. The reservoir serves as a headpond feeding the Jean-Lesage, René-Lévesque and Daniel-Johnson generating stations downstream.

The reservoir and its central island are nicknamed the "eye of Quebec" because the ring of water around Île René-Levasseur is clearly visible from space. The crater is the emblem of the Manicouagan-Uapishka World Biosphere Reserve. Quebec Route 389 runs along the eastern shore, past the lake and its hydroelectric works.

The Daniel Johnson Dam regulates water levels and generates electricity through several power stations along the river. The area is remote, and access roads mainly lead to the power generation facilities and a few viewpoints along the shore.

The circular shape forms a ring of water visible from space and has become known as the Eye of Quebec. Satellite images show the nearly perfect round structure created by the ancient meteorite crater.