The foremost city of the Douro river in Northern Portugal, the ancient trading port of Porto is one of the oldest European centres. It's world-renowned architecture and historic trading history meant that Porto was designated a World Heritage Site 1996.
The Ponte de Dom Luis is an impressive double-layered bridge which commands an inspiring and imposing view over city. Travel over it by train for great views over the city.
Porto's most famous product is fortified port wine. The caves of Vila Nova de Gaia were responsible for the storage and distribution of the world-renowned drink.