The remains of the Castle can be visited
Wolkenberg Castle

The castle ruin of Wolkenberg is in the Kempter Forest near the municipality of Wildpoldsried in the Oberallgäu district. At the end of the 20th century, the high to post-medieval castle complex was excavated and secured.
History+
Wolkenberg served as a ministerial castle for the Welfs and Staufer in the 12th and 13th centuries. A report from 1262 confirms this, when the knight Albert von Wolkenberg testified before Duke Konradin of Swabia in Constance. In 1278, Albert von Wolkenberg was first documented when he attested to the rights of the Princely Abbey of Kempten to properties in the Kempter Forest. The Lords of Wolkenberg sold the castle to the Lords of Rotenstein at the end of the 13th century. Konrad von Rothenstein inherited the castle from his father in 1339, but was forced to sell it to Ulrich von Diessen as early as 1344. Shortly thereafter, Knight Konrad von Rothenstein killed a citizen of Kempten, whereupon the Kempten citizens conquered his residence, captured him, and beheaded him. Ulrich von Diessen also gained notoriety in 1356 by killing the first freely elected mayor of Kempten and was later murdered himself. His sons Hans and Ulrich von Diessen reached a settlement in 1391 for the sawmill and the upper mill near Wildpoldsried and sold the Vogt tax and Vogt rights in 1392.
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: 47.7552, 10.4162