The remains of the Castle can be visited
Falkenstein Castle

The Falkenstein Castle Ruin, a castle complex with a history dating back to the 12th century, overlooks the Ranna Valley in Upper Austria.
History+
Falkenstein Castle was first documented in 1140. It was the ancestral seat of the noble Falkenstein family. Kalhoch von Falkenstein, the founder of Schlägl Abbey, also came from this lineage. In the 13th century, the lordship passed to the Rosenbergs, a collateral line of the Witigones, and became the scene of disputes over its ownership. Zawisch von Falkenstein, who, after an uprising against the Bohemian King Ottokar II Přemysl, assumed a leading role in Bohemia, was a prominent figure. Following his capture in 1290, Falkenstein Castle was besieged and taken by Duke Albrecht I of Habsburg in 1289. Ownership changed hands several times, including to the Walseers and Oberhaimers.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.at/ooe/oberoesterreich.html
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: 48.4942, 13.7841