dark underground corridors of an abandoned shelter. the largest secret facility of the ussr is the anti-nuclear bunker

1180 abandoned apocalypse armageddon army bad biohazard black bomb bunker cool creepy danger decay digger empty entry exploration extreme fear floors gloomy history metal military moldova mystery night nuclear olishkan olishkany radiation rot rust scary security shelter stalinism stalker steel top tour tourist travel unfinished urban ussr war world