The remains of the Castle can be visited
Tannenfels Castle

The Tannenfels castle ruin, a former tower castle, is on a sandstone rock in the Murg Valley, near the Obertal district of Baiersbronn. Its location and the visible remains from the 13th century.
History+
The visible walls of the tower castle were built in the first half of the 13th century. However, archaeological finds, including pottery and an older moat, suggest that the castle rock was already settled in the 11th or early 12th century, with an earlier structure completely removed for the later construction. The castle was not inhabited for long; it fell victim to a fire in the first half of the 14th century. Three arrowheads found in a burnt layer suggest warlike conflicts as the cause. No associated noble family is known, and a family of Tannenfels located in the Allgäu has no connection to this castle.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Burg_Tannenfels_Obertal.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: 48.5275, 8.3004