Porto, Portugal's second-largest city with about 300,000 residents, stands on the steep and rocky north bank of the Douro
river, just a couple of miles from its outlet on the Atlantic. The suburbs sprawl to the coast. Many visitors encounter Porto
on their way up the beautiful Douro valley. The city also is known for its long association with port wine, which has been
shipped from Vila Nova de Gaia, a suburb of Porto, since the 17th century. It has long been referred to as “Oporto,” a name
never used by the Portuguese and now declining in use elsewhere.