aerial cityscape view of the riverside of vila nova de gaia with shops, restaurants and winemakers and historical boats

facade portugal church porto cathedral architecture landmark building old city europe religion historic sky daylight oporto religious travel romanesque historical square monument portuguese window cityscape famous gothic blue culture day tower european outside exterior stone heritage catholic worship norte tourism world christian unesco site architectural cloud entrance outdoor medieval portugal-31december 2015:scenic landscape view ancient catedral rainy clouds background scenic aerial riverside vila nova gaia shops restaurants winemakers boats river douro