The remains of the Castle can be visited
Weikertschlag Castle

The castle ruin Weikertschlag is a historic hilltop castle in Weikertschlag an der Thaya, Lower Austria. Its exact construction date is unknown.
History+
Weikertschlag Castle was first indirectly mentioned in 1178 when its then owners Albero and Wichart were named in a document concerning the tithe for the Geras and Pernegg monasteries. After 1232, the complex came into the possession of the Babenbergs. Following the extinction of this dynasty, King Ottokar II. Přemysl unsuccessfully attempted to reclaim the castle from Rudolf von Habsburg. In 1404, the castle was occupied by Hynek von Kunstadt, Ulrich von Neuhaus, and Albert von Vöttau. In response, Dukes Wilhelm and Albrecht besieged and destroyed the complex, with the year 1399 also being mentioned as the time of the siege.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:GuentherZ_2010-07-31_0162_Weikertschlag_Ruine.jpg
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: 48.9122, 15.4722