Herthaburg Slavic Ring Wall

Here you can find out everything you need to know about Hertaburg.

From Wikipedia: The Herthaburg near the Stubbenkammer in the Jasmund National Park on the island of Rügen is a hillfort from the time of the Slavic settlement of Rügen from the 8th to the 12th century. The facility was built on an existing ridge on the north-eastern shore of Lake Hertha in Stubnitz. The area enclosed by the wall and the shore of the lake is approx. 120 × 60 m and the width of the entire wall system is over 180 m. From the outside, the wall in the north-eastern area is a maximum of 17 m high, but only 8 m from the inside. The top of the wall is 136 m above sea level. NN. The open south side of the complex borders on Lake Hertha, over which the castle was probably accessed via a bridge at the time; today's access to the interior of the castle was created later. To the northeast is the rampart of a former outer bailey, which you can clearly see from the path to the Königsstuhl.

Herthaburg was a Slavic refuge castle on the Jasmund peninsula. In it, people defended themselves in the event of attacks. Surrounded by the chalk coast, the castle was difficult to conquer. According to legend, the goddess Hertha lives in the mystical lake right next to the castle.
Today Lake Hertha is a refuge for many rare animal and plant species. Its isolated location protects it from disease and disasters. The almost circular lake is far away from other lakes and rivers. It gets its water from rain and is 11 meters deep in some places.
Source: herthaburg-ruegen.eu