bunker in slavikov, czech republic, czechia

abandoned adolf ammunition antiinfantry antipersonnel architecture army attraction bastion battle beton bomb bombshelter building bulwark bunker casemate catacomb concrete construction culture czech czechia defense empty europe forces fortification fortified from german hideout historic history hitler horror industrial infantry infrastructure landmark military monument museum nature observation occupation old outdoors outside past protection refuge republic room second sight slavikov solid studenka tourism tourist travel tunnel underground wall war warehouse wartime world ww2