old volcano stone buildings, library and city walls tower obertor in mayen, germany

windows white waterway walls wall volcano volcanic vintage village town tower tourism textured structures stonework stone steep slate significance showcasing scene roofs reflects red partially old obertor neighbourhood narrow monastery medieval mayen lush library landmark lamps house historical highlights heritage greenery germany frames framed fortification feature facade exterior estate elements design decorative dark crenellations contrast constructed classic clad city church castle buildings building area mayenne eifel fortified german street travel