The remains of the Castle can be visited
Bussen Castle

The Bussen ruin, also called Bussenburg, is the ruin of a hilltop castle on the 767 m above sea level high summit of the Bussen mountain near Offingen/Bussen in Upper Swabia, districts of the municipality of Uttenweiler in the district of Biberach in Baden-Württemberg.
History+
The castle was probably built at the end of the 11th century. In the middle of the 13th century, it was a Staufer imperial castle. In the 14th century, the castle came into the possession of the Truchsessen von Waldburg as a Habsburg fief. In December 1633, Swedish troops under King Gustav Adolf destroyed the castle during the Thirty Years' War. In 1785, the decaying castle ruin passed to Prince Anselm von Thurn und Taxis. The prince had the ruin secured at his own expense.
Layout+
The two-part castle complex consisted of an outer bailey on the middle of the mountain and a main castle in the east, of which the rectangular keep is still preserved. Apart from this restored 13-meter-high keep, which now serves as a viewing tower, only secured wall remains are preserved. West of the outer bailey is the pilgrimage church of St. Johann Baptist on the Bussen, built in 1516.
Tower+
In 1997, the district of Biberach acquired the ruin and restored the keep. A plaque with the following inscription by the dialect poet Michel Buck is attached to the castle tower:
"From the battlement of this tower, dear friend, I would like to show you this homeland of mine, the Oberland, for from this spot the distant view is incomparable.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Geak ( Diskussion ) · Wikimedia Commons · Copyrighted free use
This description is a machine translation of an excerpt from the linked Wikipedia article. The source text was written by its authors, the translation is by Mobile History; like the original it is licensed under CC BY-SA 4.0.
Location: 48.1628, 9.5572