bunker ruin of the wolf's lair or in german wolfsschanze the nazi headquarters near ketrzyn in poland

adolf architecture army attraction autumn barracks building bunker bunkers casemate cave cliff command complex concrete europe field forest formation former fort fuhrer geology german germany green headquarters historical history hitler holocaust ketrzyn lair leaf liar military museum nature nazi nazism near outdoor place plant poland polish position reconstructed reich relict remembrance rock ruin ruins second soil stauffenberg stone structure summer sunlight terrain third today travel tree trunk trzyn wall wolf wolf's wolfs wolfsschanze wood world ww2 yellow