the medieval stone double arched salt bridge, lavertezzo, valle verzasca, switzerland

alps arch arched architecture baseflow boulder bridge building dei double ecotourism europe evening flow formation highland historic landmark landscape lavertezzo lepontine locarno low mountain nature old pizzo ponte resort river rock salt salti scenery sightseeing sky slope stone street sunset switzerland tessin ticino tourism town travel val valle valley verzasca village vogorno water woods