Located in the north of Portugal by the outlet of the Douro River, it has a unique atmosphere with elegant neighborhoods and large villas sitting on narrow cobbled streets. This soulful city was classified as a World Heritage Site by UNESCO in 1996. Porto is the model of a perfect city. It is both big enough to get lost in, while being small enough for a pair of sneakers, and a pleasant stroll through its alleyways full of history and nostalgia.