The remains of the Castle can be visited
Gradenegg Castle

In Carinthia, Austria, lies the Gradenegg castle ruin, a complex with a Romanesque keep.
History+
Gradenegg was first documented on May 27, 1192, when Rudlandus de Gradnich was attested as a ministerialis of the Duke of Carinthia. The complex included a Romanesque keep, supplemented by farm buildings from the 14th and 15th centuries. A three-story palas, originally from the first construction phase, was redesigned and expanded in the 16th century, being fitted with marble window and door frames. A 15th-century curtain wall with a small corner tower in the northeast protected the castle, whose northern access was secured by a deep neck ditch. Historian F. X.
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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: 46.7633, 14.2433