The remains of the Castle can be visited
Lichtenstein Castle (Ruin) (Haldenstein)

The Lichtenstein Ruin, also known as Katzenburg due to its distinctive shape, is above the municipality of Haldenstein in the Swiss canton of Graubünden.
History+
The first mentions of the Lords of Lichtenstein appear in 1180. In the 12th century, the family split into a Lichtenstein and a Haldenstein branch, distinguishable by their similar coats of arms. In 1275, Knight Ulrich von Lichtenstein, the last secular representative of the family, died. The inheritance and the castle passed to their relatives, the Lords of Haldenstein. The castle was last mentioned in a document in 1396 in the context of a feud. In the 15th century, the complex was apparently abandoned, with no signs of violent destruction.
Source: Wikipedia · Licence: CC BY-SA 4.0
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: 46.8845, 9.5264