Roethbach Waterfall. Berchtesgadener Land, Bavaria, Germany. The Röthbach Waterfall is the highest waterfall in Germany, with a vertical drop of 470 metres (1540 ft). The waterfall is located in the Berchtesgaden National Park on the Obersee lake. The most convenient way to visit the waterfall is to take the electric boat across lake Königssee to Salet and then to hike up to the Obersee.