There are the remains of an Irish round tower on the edge of the Armoy village. An early monastery was founded about AD 460 by Saint Olcán, a disciple of Saint Patrick. The only trace of an early monastery is the stump of the round tower, which stands in the grounds of St Patrick's Parish Church. The tower is about 11 m high and has three storeys. At one time, Armoy was the main religious settlement in the Irish part of the kingdom of Dál Riata.
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.