Regenstein Castle is a ruined castle that lies three kilometres north of Blankenburg in the German state of Saxony-Anhalt. It is a popular tourist destination where, each year, a knight's tournament and a garrison festival are held.
Of this once relatively impregnable castle, which was built in the early and high Middle Ages on a 294 metre high sandstone rock towering over the surrounding area, only ruins are visible today. Several internal rooms, carved into the rock, have survived, as have the ruins of the keep. The castle is surrounded by remnants of a more recent fortress.
Regenstein Castle is No. 80 in the system of checkpoints on the Harzer Wandernadel hiking trail network.
Wikipedia https://en.wikipedia.org/wiki/Regenstein_Castle
Address (Unnamed Road), 38889, Germany
Coordinates 51°48'51.079" N 10°57'35.587" E