opatow underground route, opatow, poland

ancient antiquity archaeological archaeology archeological archeology architectural architecture archway attraction basement brick cellar cellars climbing corridor dark defense defensive destination dig digs dug dungeon dungeons europe european exhibition famous findings finds heritage historic historical history indoor indoors inside interior keep landmark level mediaeval medieval monument museum old opatow opatowszczyzna original past poland polish rock route sandstone sight sightseeing site stairs steps stone storage swietokrzyskie thick tourism tourist track travel underground urban walls