Ortnek Castle is a 12th-century castle ruin in the vicinity of the town of Ribnica, Slovenia. The ruin stands on Big Žrnovec Hill, near the village of Hudi Konec.
Wikipedia https://en.wikipedia.org/wiki/Ortnek_Castle
Address (Unnamed Road), 1316, Slovenia
Coordinates 45°46'57.244" N 14°40'14.134" E