long remianing city walls in mayen, eifel, germany

walls wall typical tranquil towers tower sturdy street strategically stone steeple slits slate sky signs setting scenes ruins rounded roofs robust road remianing reflect narrow monument monastery modern merging medieval mayen long located lined landmark includes historical historic greenery germany fortifications fortification featuring facade estate enhances elements eifel designed defense dark crosswalk contemporary construction conical clear city church chapel castle capped building blue architecture mayenne fortified town german old travel volcano