View of Douro River and terracota rooftops of The Ribeira district, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

photography vertical color image travel destinations travel outdoors day large group of people people men adult women portugal europe city urban scene ribeira district douro river river water building architecture terracotta porto cloud sky boat woman adults female females person travel destination tourist destination tourist destinations skies rivers flowing water outdoor outside man male males daytime cities urban buildings nautical vessel nautical vessels transport transportation architectural