incredible cold war era building. 60 meter underground shelter. the largest secret facility of the ussr

1180 abandoned adrenaline apocalypse apocalyptic armageddon army background bad biohazard bomb bunker construction danger dangerous decay diesel digger empty entry extreme fallout fear history house incredible male metal military moldova nerves nuclear object olishkany radiation rust scary shelter silhouette size stalinism stalker steel survivor top tourist travel underground ussr