Raffenburg, Medieval castle ruin in Hohenlimburg, Germany.

Raffenburg is a ruined hilltop castle on the 240-metre Raffenberg, a wooded hill in the Raffenberg nature reserve west of Hohenlimburg. Its oval walled enclosure measures about 60 by 80 metres, with a 120-centimetre ring wall and a ditch. In the courtyard stood the bergfried, 3.5 metres across inside with 2.6-metre walls; two cellar-equipped halls, stables and a cistern also stood here. The main gate faced east.

This fortification was built in the mid-13th century as a military stronghold and played a key role in regional power struggles. It fell in 1288 to Count Eberhard's forces after a siege that ended due to water shortage at the site.

The name Raffenburg probably comes from the Raffenberg hill on which it stands. A local legend tells of the robber knight Humbert, who surrendered on condition that his wife could carry away what she could in three trips; she carried out her husband, then her son, then so much gold that she collapsed at the foot of the hill.

You can reach the ruins from the former Märchenwald parking lot by following a steep forest path marked with information panels. The trail is steep and requires good walking shoes and sure footing, especially when the ground is wet.

About ten metres east of the castle grounds, in dense undergrowth, stands a sandstone monument from 1837, renovated in 1983, to Emil Friedrich I of Bentheim-Tecklenburg (1765–1835). Its inscriptions include the lines "Geliebt, beweint, im stillen Frieden" and a reference to John 14:16–19.