© 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 Porto Rooves and Church Old World Shop - Porto A Pérola do Bolhão Delicatessen - Porto Porto Shopfront The Cube - Praca da Ribeira - Porto Castelo do Queijo - Matosinhos - Porto