Europe on a shoestring12/21/2010December 21, 2010Porto is Portugal's second largest city. Famed for its port wine, the registered UNESCO World Heritage Site sits pretty on the banks of the Douro River. It's old charm makes it worth a visit says DW's Matt Hermannhttps://p.dw.com/p/QhfKPicturesque PortoImage: Nina GruntkowskiAdvertisement