Lake Walchen (Walchensee) is one of the deepest and largest alpine lakes in Germany. It's almost 200m deep and it's located some 70km south of Munich, in the middle of the Bavarian Alps.
I got there when the sun was about to go below the western ridges and the light was beautiful. The image might look slightly over-saturated but the colors are real, it was a gorgeous view.
Other views of the lake:
HDR from 3 RAW exposures, 18-55 kit lenses, Hoya polarized filter, tripod. Adjusted for levels/etc in Lightroom.