Herblingen Castle in Stetten was probably built at the beginning of the 13th century by the Lords of Herblingen. In 1281 Konrad von Herblingen rebuilt the chapel, which may have been existed already in the 11th century. Herblingen family died out in the 15th century and after then castle owners changed many times.
The bank director Johann Wilhelm Gestefeld from Vienna acquired the castle in 1733 and converted it into a residence. By removing the battlements, drawbridge and ring wall he completely changed the appearance of the medieval castle. The trenches were also filled. The oldest existing part of the castle is probably the keep from the 13th century.
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.