Located in northern Portugal along the Douro River estuary, the old sailing port of Porto is a World Heritage Site and the second largest city in Portugal. While retaining the timeless charm of a small town, Porto also has many of the modern advantages of a big city. Browse the expansive art collection at the Soares dos Reis National Museum, view the ornate interior of the Church of Sao Francisco and explore the medieval maze of stairways and terraces in the old quarter of Ribeira. Don’t miss the chance to visit the Vila Nova de Gaia area to sample some of Porto’s famous Port wine. Other popular attractions include the 12th-century Porto Cathedral, Clerigos Tower and the Harry-Potteresque Livraria Lello bookshop, showcasing some magnificent neo-gothic architecture.