Oporto is the most important city in Portugal, after Lisbon. It is located in the north of the country, on the right bank of the Duero at its mouth in the Atlantic Ocean.
Its historic center was declared a World Heritage Site by Unesco in 1996.
Other tourist-cultural attractions are the Clérigos tower, made by Nicolau Nasoni, the Casa da Música and the Serralves Foundation, dedicated to contemporary art, which is The most visited museum in Portugal. On the southern bank of the Douro River are the famous wine cellars, although it no longer belongs to the municipality of Porto but to Vila Nova de Gaia. It is about 140 km from the Spanish border with Galicia, which can be crossed by highway.