There is certainly a place in Austria which is a dry park in the winter and a 10m deep lake during the summer time. Located at the foot of the Hochschwab Mountains, in Tragoess, Styria, Green Lake is among the strangest natural phenomena in the world. Throughout the cold winter season, this place is almost totally dry, and even used as a country park where hikers love to come as well as spend some time away from urban disturbances. However the moment temperatures increase, the snow and ice covering the mountain tops start to melt, and the water pours down, flooding the basin below with crystal-clear water.
Water levels go from one-two meters just around, to over 10 meters, during the early summer season. The waters of Green Lake are highest in June, after this the amazing place is invaded by divers, interested to see what a mountain park seems like underwater. Fish swimming over wooden benches, a grass-covered bottom, trees, roads and even bridges create a surreal setting that feels like it belongs on dry ground. That’s because for half of the year, that’s exactly where it was.