Grüner See | Styria, Austria
Grüner See (Green Lake) is a lake in Styria, Austria near the town of Tragöß. The name “Green Lake” originated because of its emerald green water. The clean and clear water comes from the snowmelt from the karst mountains and has a temperature of 6-8°C (42.8-46.4°F). During the winter, the lake is only 1–2 m deep and the surrounding area is used as a county park; however, during the spring, when the temperature rises and the snow melts, the basin of land below the mountains fills with water.