The many castles and defense structures (the so-called "Motten", sngl. "Motte") that dot the area in whole or as ruins are indications of a history of martial as well as raiding forays in and around Wegberg. One infamous stronghold that remains the focal point of many anecdotes is the castle of a robber baron located in nearby Gripekoven. The castle with its walls and swampy trenches was deemed impregnable until 1354, when it was successfully besieged and razed. Today, only a small hill hints at its former location.