© All Rights Reserved A particularly placid section of the River Douro as it flows towards Porto. The boat is a barco rabelos one of the boats used to bring the wine down the river from the Upper DouroRelated images Steep street in Miragaia - Porto Arrábida Bridge glimpse from Crystal Palace - Porto Ponte Dom Luis I in Porto - Close Up Praia Castelo do Queijo - Porto Avenida do Brasil - Porto Cais do Marégrafo Foz - Porto