Forty perched dune lakes can be found on the island. These lakes are formed when organic matter, such as leaves, bark and dead plants, gradually builds up and hardens in depressions created by the wind.
The island also has barrage lakes (the most famous being Lake Wabby), formed when moving sand dunes block a watercourse, and "window" lakes, formed when a depression exposes part of the regional water table.
Lake Mc Kenzie, with is clear blue waters and white sandy shores, covers more than 150 hectares and is over five metres in depth. Perched high in a sand dune it is 100 metres above sea level.
Basin Lake is one of the best examples of a black water perched lake. It covers and area slightly larger than a football oval and is eight metres in depth.
The deepest lake is Lake Wabby at 11.4m.
Bogimbah Creek, 8km north of Kingfisher Bay, is the largest creek with a flow of 166 million litres of water a day.
Eli Creek is the largest creek on the eastern side of the island with a flow of 80 million litres of water a day.
The world's largest perched lake is Boomanjin covering 190 hectares. The island also has the world's highest perched dune lake, Boomerang Lake, 130m above sea level.