Castle ruins can be visited
Ehrenstein Castle

Ehrenstein Castle Ruin refers to the ruin of a rock castle on the 536 m above sea level "Löwenfelsen" near the Ehrenstein district of the municipality of Blaustein in the Alb-Donau-Kreis in Baden-Württemberg.
History+
The castle was built in the 12th century; Eberhard von Erichstain is mentioned in the Zwiefalten chronicles around 1137/38. The castle was probably an imperial fief of the Counts of Dillingen; between 1209 and 1216, a Heinrich von Ehrenstein was a feoffee of the Dillingen Counts. Around the year 1220, the castle was then extended or rebuilt with ashlar masonry. In 1259, the Dillingen Counts sold the castle to the Counts of Helfenstein, who in turn later sold it to the House of Württemberg.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: MikeAtari / CC BY-SA 3.0 via Wikimedia Commons
This description is a machine translation of an excerpt from the linked Wikipedia article. The source text was written by its authors, the translation is by Mobile History; like the original it is licensed under CC BY-SA 4.0.
Location: 48.4168, 9.9213