mysterious wlodarz adit, riese complex in lower silesia. underground city of osowka tunnels dug by the germans during world war

adit adolf antique background bunker cavern ceiling city complex concrete copper corridor dark dug during explore germans germany gold golden headquarters hill hitler hollow light lower metal mine mines mining monument mountain museum mysterious mystery nazi old ore osowka owl poland riese rust rusty silesia town train treasure tungsten tunnel tunnels underground vault walim waodarz war wlodarz world