Traditional waterfront houses in the Ribeira district on the Douro River with crowd on river bank, Porto, Portugal, Europe

travel destination photography horizontal colour image porto portugal ribeira duro river banks waterfront houses tradition balconies duro river river banks building exterior architecture day facade sky city urban scene large group of people men women side view full length tourist tourism sitting umbrella balcony water sea outdoors europe colour color image color outside tourist destination travel group cities traditional traditional culture tourists holiday maker holiday makers on holiday on vacation