Falkenburg Castle, Medieval rock castle in Wilgartswiesen, Germany.

Falkenburg is a ruin on a 336.9-metre sandstone crag above Wilgartswiesen, with a long, low band of reddish-brown rock in horizontal strata. Its elongated layout has a 50 by 11 metre upper ward reached by a staircase from the lower ward with gate and drawbridge. Remains include a 2.5-metre stump of the bergfried, a cistern, gatehouse, rock chamber and living quarters.

Werner I of Bolanden founded the castle around 1125 as a vassal of Duke Frederick II of Swabia. The site itself was older and appeared in documents from 1019.

The castle displays medieval building methods using sandstone typical of the region, reflecting its connection to local craft traditions. Visitors can see how these materials and techniques influenced the broader architecture of the area.

The preserved walls and towers are walkable across the castle grounds, but the terrain is uneven with significant elevation changes. Visitors should be prepared for rocky surfaces and bring sturdy footwear.

The castle was blown up by French troops in 1680, not 1638; the English source's 1638 demolition by Marshal Schönbeck conflicts with the German account. After the destruction the Leiningen office of Falkenburg, which had administered the whole Frankenweide, was moved to Wilgartswiesen. The Leiningen-Dagsburg-Falkenburg line resided at the castle until 1612, when it moved to Schloss Heidesheim.