Location: Green Lake on the foot of Hochschwab Mountins of the Austrian Alps in Tragoess, Styria.
Web: www.tragoess.at (in German)
During the autumn and winter months, the county park is completely dry. But as soon as the spring arrives, the ice begins to melt off the mountain caps and flows down to the basin. The water level rises up to 10 meters and forming a lake. By the month of June, it becomes an unique diving attraction site extending to the month of July.