Kaska Lake (, ) is the long in westâÂÂeast direction and wide lake on Triangulation Beach, Nelson Island in the South Shetland Islands, Antarctica. It has a surface area of and is separated from the waters of Bransfield Strait by a wide strip of land. The area was visited by early 19th century sealers.
The feature is so named because of its shape supposedly resembling a combat helmet ('kaska' in Bulgarian).
Kaska Lake is centred northeast of Vidaurre Point, the south extremity of the island, and west-southwest of Ivan Alexander Point. British mapping of the area in 1968.