Spain is located in southern Europe with a population of around 44 million. Its main industry is tourism, benefited by warm weather. Popular tourist destinations include cities like Barcelona and Madrid as well as island resorts such as Mallorca and Ibiza. The document then focuses on the city of Salamanca, located in western Spain near the border of Portugal. Salamanca contains many monuments from different centuries representing its diverse history and is a designated UNESCO World Heritage Site. It is also known for its university, one of the oldest in Spain and Europe, which has long influenced the culture of the city.