Porto
Porto is a picturesque city in northern Portugal, located on the Atlantic Ocean at the mouth of the Douro River. It is the country's second-largest metropolitan area, home to about 1.7 million people. The city is renowned for its production of port wine, which has gained worldwide acclaim. In the heart of the city, you can admire the historic Ponte Dom Luís I bridge and the colorful houses in the Ribeira district. Average temperatures range from 10 °C in winter to 25 °C in summer. Spring or autumn are the best times to visit Porto, when the weather is mild.