Sant'Alessio Siculo Castle was built by the Byzantine emperor Alexios I Comnenos in his war against the Normans and the Arabs, who also held it. It was extended during the Norman era in the 12th century. In 1535 it was are residence of King Charles V Habsburg during the Conquest of Tunis. The castle consists of two towers on different peaks.
Kakesbeck is one of the largest medieval fortifications in Münsterland and the oldest castle in Lüdinghausen. The imposingly grown complex originated in 1120 as a motte, a small hilltop tower castle. After numerous changes of ownership, the castle was extended onto two islands, but it was not until the 14th century that it underwent significant alterations and extensions under the von Oer family. The estate experienced its heyday in the middle of the 18th century, when it covered an area of almost one square kilometre and consisted of five further outer castles in addition to the core castle, which were secured by ramparts and moats.
The well-maintained condition of the castle today is thanks to the late Wilfried Grewing, the former lord of the castle. The foundation named after him has been particularly committed to preserving the property since 2020.