The document discusses the physical geography and relief of Spain. It describes how there is a large central plateau in the middle of Spain that is divided into northern and southern subplateaus by the Central System mountain range. It lists several mountain ranges that surround the plateau, such as the Leon Mounts, Galician Massif, Cantabrian Range, Iberian System and Sierra Morena. It also discusses exterior mountain ranges including the Basque Mounts, Pyrenees and Coastal-Catalan System.