The remains of the Castle can be visited
Tiefenstein Castle (Ruin)

The Tiefenstein Ruin is at approximately 520 meters above sea level in the municipality of Görwihl in the district of Waldshut, Baden-Württemberg. Of this hilltop castle, only a few wall remnants remain today.
History+
The origins of Tiefenstein Castle likely date back to the 13th century. It was first mentioned in a document in 1241. It is believed that the Lords of Teufen were its builders and that the castle gave its name to the then-village of Tiefenstein. Later, the castle lords themselves adopted the name "Lords of Tiefenstein". In 1272, the complex was destroyed by Rudolf von Habsburg.
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: 47.6260, 8.0869