Castle it is Bardjov in the Eastern Czech Rep near Russia & Poland.
Castle is Bavarian & Austrian influence from the Medevil era.
Germans dug under castle with slave labor & from medevil times as well by Vlad.
The Germans reused silos for early V2 rockets.
Bunkers & MG nests line hillside up to castle area in select areas.
Our Unit was composed of SAS, OSS, Allied prisoners from British, US, Polish, Czech, German jews, from prison stockades in UK for suicide missions.
Whole castle exterior is camoflouged but still very Bavarian style..