huelen zant, fortress tower ruin in luxembourg

fortification schlassbrck luxembourg protection monastery fortified community luxemburg ltzebuerg fortress historic building landmark monument waterway security medieval capital country remains tourism terrain history huelen castle temple middle europe hohler creuse chteau tower ville walls ruins gated stone grand duchy zant ruin town city fort wall rock zahn dent stad pont old age lux zant zahn luxembourg creuse lëtzebuerg schlassbréck château luxemburg lux europe medieval castle tower old history historic building ancient wall fort fortress built craft power walls fortification town protection security community age