Burg Ehrenfels Castle ruins amid hillside vineyards of Rhine river gorge, Germany

burg ehrenfels castle ruins hillside vineyard rhine river gorge germany aerial middle rhine valley german medieval fortress ruedesheim drone stronghold middle ages space for text binger loch remains bingen am rhein customs post watchtower old historic architecture romantic rhine gorge high angle mountainside pedestal preserved terraced burg ehrenfels castle ruins european landscape perched slope hillside castle bingen rudesheim jib crane lowering side 4k