POV shot of Dom Luis I Bridge over Douro River from Rabelo boat, Porto

porto portugal dom luis i bridge rabelo boat douro river people crossing blue cloudy sky pov shot urban view cityscape river crossing landmark tourist destination architecture historical bridge water transportation urban life scenic beauty travel experience bridge architecture city exploration tourist attraction cultural heritage urban activity leisure time pedestrian traffic traditional boat historical landmark overcast sky arch boat city dom luis bridge domluis douro excursions landscape panorama promenade river steel structure tourism tourist transport travel unesco urban water