Your dental tourism in Porto. If you want to discover Porto, try walking in the late afternoon along the banks of the river Douro, visit Porto is the second largest city in Portugal and is located in the north of the country. The city of Porto has 1.7 million inhabitants. UNESCO has listed its network of narrow streets as a World Heritage Site. The best way to discover Porto is to walk along its streets full of history and nostalgia.Historic sites such as the Clérigos Tower, the Crystal Palace Gardens, the Cathedral, the Bolhão Market and the Chapel of Souls. In Porto there are festivals and cultural activities throughout the year. For example, Fantasporto, which is an International Film Festival, the St. John’s Festival, which is the largest festival in the city and is held in June, and Ritual Rock, a rock festival which is held over a weekend in late August.