The remains of the Castle can be visited
Wielandstein Castle

The Wielandstein castle ruin is a collection of former fortifications, rising on a rock ridge above the Tobeltal valley. This site consists of the remains of several castles.
History+
Around the year 1150, the first parts of the castle group, namely Alt-Wielandstein and Hinterer Wielandstein, were built. From 1240 onwards, the Lords of Wielandstein emerged, serving as knightly vassals of the Dukes of Teck. Around 1330, they abandoned the castle. In 1386, the complex came into the possession of the Württemberg counts. In 1478, it was transferred to the noble Schilling family as free property, although by this time large parts were already uninhabitable and decay was progressing. During the Peasants' War in 1525, the castle suffered its complete destruction.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Oliver L. 74 / 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: 48.5473, 9.4864