The ruins of the Lichnice Castle are on the edge of the Iron Mountain near the village of Podhradí, in the municipality of Třemošnice, about 15 kilometres east of Čáslav.
Wikipedia https://en.wikipedia.org/wiki/Lichnice_Castle
Address (Unnamed Road), Podhradí 53843, Czech Republic
Coordinates 49°52'43.73" N 15°35'10.616" E