Tourists on Boat tour on the Douro with the famous Dom Luís I Bridge in the background

porto boat portugal boat visit daytime sightseeing river cruise porto landmarks dom luis i bridge porto sights portuguese experience waterfront exploration city view river douro historical architecture scenic tour cultural journey riverside charm portos beauty urban landscapes waterway adventure porto discovery bridge crossing tourist attraction river views portos heritage waterfront excursion dom luis i bridge view daylight hours boat sightseeing portos riverfront daylight tour portuguese landmarks urban adventure iconic bridge boat cruise riverside marvel daylight scenery riverside vista daylight sightseeing urban excursion portos urban landscapes beauty heritage riverfront ladmarks culture river douro