Portugal is a small country that is located off the Atlantic coast of the Iberian Peninsula. Due to its beautiful coastline and its historical heritage, it is one of the most visited countries in Europe. Its smaller size makes it easier to get around and see more places than neighboring Spain at the same time. The mild climate makes it a year-round vacation destination, where travelers can see Roman and Moorish ruins among other tourist attractions in Portugal. The Peña National Palace looks like a fairytale castle, as it rises above the clouds on cloudy days. Praia da Marinha is considered one of the most beautiful beaches in Portugal. Located in the Atlantic coast region of the Algarve, the beach is flanked by beautiful blue waters on one side, and sandy beaches and high cliffs on the other. The Torre de Belém, also known as the Torre de San Vicente, is located on what was once an island in the Tagus River in Lisbon, the capital of Portugal. São Jorge Castle is one of the main tourist attractions in Lisbon, as it can be seen from all over the city. It dates back to Roman times, although the Arabs rebuilt the fortifications in the 10th century. Cais da Ribeira is a charming and picturesque district of Porto, sometimes called the soul of Porto. It is made up of medieval streets that lead to a square next to the Duero River. Medieval buildings are lined with bars, cafes, and restaurants, making Ribeira a popular place to eat and drink. Obidos Castle is an impressive structure that sits on a hill in Obidos, a small town dating back to Roman times on the Atlantic coast of Portugal. Cabo Girão is located on the southern coast of Madeira, in the Portuguese archipelago of the same name. At 570 meters (1,870 feet), the cliff is often referred to as the highest cliff in Europe, but at least three European cliffs are higher. The University of Coimbra is one of the oldest and most continuous in Europe, founded in 1290.