Porto is one of the most popular cities to visit in Europe right now – and with good reason. The stunning Old Town on the picturesque Douro River, complete with six bridges, is a UNESCO World Heritage Site. You will find stunning Beaux Arts and Baroque churches, palaces and other buildings scattered around the city. Due to its unique soil, the Douro Valley is known worldwide for its wines. Tip: You can take a day trip from Porto and take the landscape of the Douro Valley with you.