The Mushyl lake (, Müšyl Jer), nicknamed the Sea Eye (, Morskoy Glaz) is a minor karst lake in Shariboksad, Volzhsky District, Mari El, Russia. Located at the foot of the hill its bright green water is extremely deep (38.5 m) compared to the surface area (45x50 m).
In 2022 the water level has dropped, leaving the lake nearly dried.
Etymology Müšyl ([], ) means crater in the Mari language.Команда Кочующие, Озеро Морской Глаз - Мушыл In early documents it was known only by its Mari name, written in the Russian text with Mari diacritics.Агроклиматический справочник по Марийской АССР, 1961 Later, Russian-speaking tourists were inspired by the sea-like colour of the water to give it the more poetic Russian name.
Popular culture According to Mari legend, a wedding procession fell into the Sea Eye and died when it suddenly appeared in an eruption.
The lake has become popular with tourists.
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