Elgygytgyn Lake

Lake Elgygytgyn, also transcripted El'gygytgyn, is a crater lake in Anadyrsky District, Chukotka Autonomous Okrug in northeast Siberia, about 150 km southeast of Chaunskaya Bay.

The word "Elgygytgyn" means "white lake" in the Chukchi language.

The lake is of particular interest to scientists because it has never been covered by glaciers. This has allowed the uninterrupted build-up of 400 m of sediment at the bottom of the lake, recording information on prehistoric climate change.

Source: Wikipedia