Lake "Sea Eye". Cheboksary. Russia

http://www.openarium.ru/%D0%A0%D0%BE%D1%81%D1%81%D0%B8%D1%8F/%D0%A7%D0%B5%D0%B1%D0%BE%D0%BA%D1%81%D0%B0%D1%80%D1%8B/%D0%9E%D0%B7%D0%B5%D1%80%D0%B0/#78876962

The "Sea Eye" lake is located in the Republic of Mari El in Russia. It is interesting for its unusual shape. The time of formation of the lake is unknown.

Thanks for the support in my messages.@magnata