The Bastei is a rock formation rising 194 metres (636 ft) above the Elbe River in the Elbe Sandstone Mountains of Germany. Reaching a height of 305 metres (1,001 ft) above sea level, the jagged rocks of the Bastei were formed by water erosion over one million years ago. They are situated near Rathen, not far from Pirna southeast of the city of Dresden, and are the major landmark of the Saxon Switzerland National Park.