Holdberg Castle is the ruin of a hilltop castle on the steep bank of the Lech. Today the facility is the only castle ruin in the entire Lechrain area between Donauwörth and Füssen.
The Schloss Hofhegnenberg is located on the edge of the Steindorfer community part Hofhegnenberg on a hill. The well-preserved aristocratic residence dates back to a high medieval castle, from which the stump of the keep can be seen.
The wealthy merchant Anton Welser had the palace built in 1544 in the rural town of Bobingen, just outside Augsburg. His son Markus Welser sold the palace and park to Octavianus Secundus Fugger of Kirchberg and Weissenhorn in 1590.