Dilsberg is a fortified hilltop settlement about 5 kilometres from Neckargemünd, and one of the best-preserved medieval villages in the Neckar valley. The castle itself dates from the mid-12th century; it was expanded repeatedly by the Electors of the Palatinate and granted town rights in 1347. It was abandoned around 1822 and partly quarried for building stone, but enough survives to make a visit worthwhile.
The main attractions are the 46-metre-deep castle well and the 78-metre tunnel system cut through the hill, both dating from the 17th century. The views from the outer bailey over the wooded Neckar valley are excellent. The Commandant's House (1550s) has been converted into a cultural centre and café. You can reach Dilsberg on foot from Neckargemünd in about 45 minutes along a waymarked path through the forest.