old townhouses medieval spreuerbrucke and musegg wall fortification system with towers of lucerne, switzerland

alps altstadt architecture bridge building city cityscape dam edifice embankment europe fortification house landmark lozarn lucerne luzern male mannliturm mansion medieval museggmauer musseg needle old reuss reussnadelwehr river sightseeing spreuer spreuerbrucke suisse switzerland tourism tower town townhouse travel urban wall wooden