Porto is the second city Portugal after Lisbon. Located on the estuary of the Douro River in Northern Portugal, it is one of the oldest populated cent

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Porto is the second city Portugal after Lisbon. Located on the estuary of the Douro River in Northern Portugal, it is one of the oldest populated centres in Europe. Its historical centre was proclaimed a World Heritage Site by UNESCO in 1996. South of the river lies its twin city, Gaia, which hosts most of the numerous wine and port cellars; it is also more populous than Porto itself. Porto is graced by no less than six diverse road and rail bridges crossing the river. In consequence, it is often referred to as the City of Bridges. Here we see its most famous bridge, the Dom Luis. Built in 1886 by a student of Eiffel, it has two levels: the lower one carries pedestrians and cars, whilst the top serves metro trains.

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Photo credit: © Jon Bower / Alamy / Afripics
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