Porto (or Oporto) is Portugal's second-largest city, located along the Douro river. Its well-preserved historic center is considered a World Heritage Site by UNESCO since 1996.
Walking along Ribeira do Porto ("Porto's riverside") is a great way to know this amazing city!
Make sure you observe the surrounding architectonic features of this area, sit down at a local restaurant and cross Ponte Dom Luís I ("Dom Luís I bridge") to see the city from a different angle (from Vila Nova de Gaia, Porto's neighboring city)!