The remains of the former rampart complex Güllener Ring are located around 800 m south of Linnepe on the northern slope of the Dümberg at an altitude of 440 to 460 m. The round main castle had a diameter of around 55-60 meters. This part was enclosed by a strong rampart and an outer ditch. There was a smaller outer bailey to the north, which was also secured by a rampart and ditch. The only access to the main castle was from the north-west through a rampart gate, through which the castle ruins can still be entered today.
Remains of the ramparts and ditches have been preserved. The numerous stones lying in the terrain probably come from a ruined wall in the rampart. The height of the inner rampart is still 2 to 3½ m, the ditch is between 5 and 6 m deep, and
a smaller section of rampart with an outer ditch can still be found around 100 m to the south.
the site has been a listed building since 1978. The Güllener Ring is one of the Carolingian-Ottoman castles.
