Excerpt from Sunny Skyz
In Styria, Austria, near the town of Tragoss, there is a park that only exists during part of the year. During the summer months, the park turns into a lake up to 40 feet deep.
Towering above the lake/park are the Hochschwabb Mountains. During the winter, the mountains are packed with snow, but when the heat of spring kicks in, all of the snow starts to melt and the water runs down the hills, filling the park.