Kaltenburg Castle, Medieval castle ruins in Lonetal, Germany
Kaltenburg Castle is a fortified ruin perched roughly 60 meters above where the Hürbe and Lone rivers meet. The site retains original stonework and two square towers that reveal the building's medieval design.
Construction took place between 1150 and 1180, initiated by Heinrich von Kalden during the reign of Emperor Frederick Barbarossa. The fortress served to control and settle this hilly region during the High Middle Ages.
The Schwäbischer Albverein Hürben members contribute their time and skills to maintain this important regional medieval fortification site.
This site sits on a walking trail and can be reached on foot from the village of Hürben, with the path going through the Lone valley. Sturdy shoes are recommended since the climb to the ruin follows steep, unpaved terrain.
Right beside this castle site lies Charlottenhöhle, one of the longest cave systems in the Schwäbische Alb region. Visitors often combine both locations in a single trip, experiencing the ruins, woodland, and subterranean passages together.
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