Portas do Sol is located in Lisbon, Portugal. A visit to this observatory is an excuse to enjoy the most authentic features of Lisbon with a wonderful view of the eastern side of the Alfama region and the Tagus River, and this view extends to the edge of the river in a unique maze of streets, stairs and alleys, and different domes can be enjoyed and the different types of architecture that make up the churches of Saint Stephen, Saint Michael and Saint Vincent de Fora.