The remains of the Castle can be visited
Leckstein Castle (Ruin)

The Leckstein Ruin, also known as Lagstein, is a hilltop castle ruin situated on a valley slope near Gauselfingen in the Zollernalbkreis.
History+
The origins of Leckstein Castle date back to between 1100 and 1150, when it was constructed as a hilltop castle. Its heyday was limited, as its decline began as early as the 14th century. There is no recorded information about the original builders and inhabitants of the complex. The castle ruin is only mentioned again in 1544, in the context of a border description.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: MiLe / CC BY-SA 4.0 via Wikimedia Commons
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 48.2740, 9.1585