This trail explores a karst landscape unique in Europe, featuring caves, disappearing streams, conical hills, crags and white cliffs, all formed from the southern Harz's distinctive rock – gypsum.
The karst walking trail snakes its way through a fascinating region of high biodiversity: this small, intricate network of habitats in the southern Harz is home to a variety of rare and heavily protected species of flora and fauna. However, it is the karst landscape – formed from sulphate rock (gypsum and anhydrite) – that makes the southern Harz region particularly special. These rocks dissolve especially quickly, causing the water from the karst springs to drain away. The Rhume spring (62 million cubic metres) alone accounts for 40,000 tonnes of gypsum and 17,000 tonnes of limestone leaving the southern Harz every year, having travelled along the Weser and into the North Sea. This results in countless deep hollows (10-200m), many of which collapse as they eventually grow too large, forming sinkholes on the surface. This gives rise to a varied and unusual landscape everyone can enjoy on the karst walking trail, featuring Heimkehle Cave and Barbarossa's Cave, the Juessee lake and 'Swimming Island' sinkholes and the moor landscape of Teufelsbäder ('devil's baths'). Disappearing lakes and rivers such as those in the Bauerngraben nature reserve or the Sieber river are typical of karst landscapes, as are the many gypsum cliffs.
Heimkehle show cave
At two kilometres in length, the Heimkehle cave is one of the biggest in the southern Harz and 700 metres of it are open to the public. In winter, the cave is home to many bats, and visitors in August and September can often see them flying around.
At a glance:
Starts and ends: Pölsfeld (near Sangerhausen)
Number of stages: 6
Altitude variation (approximate values): Altitude variation (approximate values): ascent m, descent m (pathway at a height of between 170m and max. 290m above sea level)
Terrain: 49% unmade, 19% asphalt, 32% other, e.g. gravel