© All Rights Reserved A cruise ship on the River Douro near Peso da Regua. There are many such trips leaving Porto ranging in a few hours duration to a few days. ©Can Stock Photo Inc/phbczRelated images Arrabida Bridge view from Entre Quintas - Porto Traditional rabelo boat - Ribeira - Porto Foz do Douro - Beach side dining - Porto River Douro - Porto Cafe behind the Ribeira - Porto Statue in Porto