Upper Kanawauke is the only natural lake of the three.

It is the only existing lake at the centre of the city.

It is the only lake with a road-accessible public recreation area on its shores.

It also has a small reservoir for swimming, the only lake in Rock County.

These are not the only artificial lakes that have been and will be created in the east of Germany.

It is the only lake in Sumatra which has a natural outlet to the west coast.

New Hogan Lake is the only lake on the river.

It's the only lake on the island fit to swim in.

It is the only lake on the islands that a person cannot see the other side.

It is the only natural lake in the area.