This is the Green Lake in Tragoess, Styria, which sits at the foot of Austria's snow-capped Hochschwab mountains. In Autumn and Winter, the lake sits low and shallow, revealing a park with benches, trees, and beautiful flowers of all colors. It's a popular spot for hikers and nature lovers. But when Spring begins to bloom, the snow from the mountains begins to trickle down, causing the park the flood with crystal clear ice water. The lake gets its name from the bright green foliage beneath and can rise up to 10 meters! Divers come to explore at the peak of the season, in June, and dwindle towards July, when the waters begin to recede.