exterior view at the iconic zubizuri bridge, bilbao downtown city, nervion river and river banks and buildings

zubizuri bridge bilbao calatrava white modern architecture pedestrian santiago urban landmark spanish cablestayed suspension cityscape skyline tourist attraction tourism contemporary design steel city walkway engineering iconic structure spot architectural masterpiece river nerviasup3 waterfront travel scene modernity footbridge view elegance development attractions futuristic center destination sightseeing transportation landmarks panorama visit exterior downtown nervion banks buildings spain 2021: