Bottom up shot of riding train on top of Dom Luís I Bridge crossing river Douro against blue sky

train porto city tourist ponte dom luis i douro river old town bridge blue sky cinematic structure tram transport metal slow motion ride metal arch bridge cross ponte dom luis historic sun building portugal water port woman establishing shot sunny day cityscape river boat oporto shore monument road riverbank tourism dock street pier panning shot shoreline rivershore buildings town background visit over bottom up arches