View of Douro River and The Ribeira district from Dom Luis I bridge at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

photography horizontal color image travel destinations travel outdoors sunset dusk incidental people portugal europe douro river river water ribeira district architecture porto city urban scene building cloud sky light illuminated sunshine sunlight boat tree nature dramatic sky trees travel destination tourist destination tourist destinations sunny sundown evening twilight skies rivers flowing water outdoor outside cities urban buildings nautical vessel nautical vessels transport transportation architectural