The Leopoldsteinersee is a mountain lake in Styria, in the east of Austria, about 4 kilometres northwest of the city of Eisenerz.
The lake is named after the nearby Leopoldstein Castle.
Wikipedia https://en.wikipedia.org/wiki/Leopoldsteinersee
Address 8790, Austria
Coordinates 47°34'19.387" N 14°51'41.311" E