Porto is the second largest city in Portugal. The story of Porto dates back to the fourth century with the Roman occupation of the Iberian Peninsula, although Celtic ruins Proto - Celtic that were discovered in several areas. The historic center is a World Heritage Site, UNESCO, is one of the most visited tourist spots in the city of Porto, where you can find several points of commerce, squares and historic buildings, which are at the origin of the city like the Cathedral. Foz is another highly tourist area, considered by many the most beautiful part of town where you can enjoy the beauty of the Atlantic Ocean coupled with a beautiful and romantic promenade. Take a tour of the city with City Sightseeing Port and you will see all the things there are to see and do in Porto.