The Königssee is a natural lake in the extreme southeast Berchtesgadener Land district of the German state of Bavaria, near the Austrian border. Most of the lake is within the Berchtesgaden National Park.

The Königssee is a natural lake in the extreme southeast Berchtesgadener Land district of the German state of Bavaria, near the Austrian border. Most of the lake is within the Berchtesgaden National Park. It stretches about 7.7 km (4.8 mi) in a north-south direction and is about 1.7 km (1 mi) across at its widest point.

Due to its picturesque setting, the lake and surrounding parklands are very popular with tourists and hikers. In addition, the surrounding sheer rock walls create an echo known for its clarity. On boat tours, it has become traditional to stop and play a flugelhorn or trumpet to demonstrate the echo. 

- Wikipedia