--> The Arrabida bridge over the River Douro in Porto. The concrete bridge was built in 1963 and was for sometime the widest single span concrete bridge in the world. It is 70 metres above the water and spans 252 metres Posted by Travel in Portugal on Sat, 21/12/2013 - 21:18 × Related images Chapel of Carlos Alberto - Crystal Palace gardens - Porto Escadaria Entre-Quintas - Porto Downtown - Old Porto Avenida do Brasil - Porto Houses in the Ribeira - Porto Houses on Rua Dom Manuel II - Porto