Burgruine Adelburg, Castle ruin in the Upper Palatinate, Bavaria, Germany

Burgruine Adelburg is a fortified castle ruin located on a forested hilltop, defined by its roughly 5 meter high ring wall that still stands distinctly visible. The structure demonstrates the medieval construction methods typical of its era.

The castle was built in the second half of the 12th century by the Lords of Adelburg, with Engelhardus de Adelenburg first mentioned around 1180. The family died out by 1230, and in 1246 the inheritance was contested during the Staufer conflict. By 1269 the castle was among Konradin's Staufer estates and was frequently pledged, passing through the hands of the Auer, Mendorfer, Parsberg and Wiesbeck families.

A local legend holds that a tunnel ran from Klapfenberg and Oberweiling beneath the Schwarze Laber to the Adelburg, so villagers could shelter in the castle from passing troops. The story is still told in the villages around the Kellerberg.

The ruin is reachable through marked hiking trails from surrounding villages and offers visitors an experience immersed in the natural landscape. It serves well as a destination while exploring the area on foot.

Local tradition speaks of an underground tunnel system that ran from nearby settlements beneath the Schwarze Laaber river to reach the castle. These hidden passages remain subjects of regional curiosity and conversation.