The Jarama, in its turn, receives the Lozoya, Guadalix, Manzanares (which flows by Madrid), Henares, and Tajuña; (8) the basin of the Douro, which rises in the Peña (Rock) Urbion, in the Province of Logroño, 7216 feet above the sea level.
To the south-east of this was another island, where is now Bejar and Sierra de Gredos, comprising part of the Provinces of Avila, Segovia, and Toledo.
To the north-east, the Pyrenees and the Catalonian coast took the form of islets, while in other directions other islets occupied the sites of Lisbon, Evora, Cáceres, Badajoz, Seville, Cordova, and Jaén.
The mountain masses may be divided into six groups: (1) the northern, consisting of the Pyrenees on the east and the Cantabrian Range on the west, and terminated by Capes Creus and Finisterre; (2) the Iberic, or eastern, comprising the mountains which bound the basin of the Ebro and extend as far as Cape Gate; (3) the central system, the Carpetan, or Carpeto-Vetonic, Range, so called from the Carpetani and Vetones who inhabited its slopes in ancient times; (4) the Mountains of Toledo, or Cordillera Oretana; (5) the Betic system, or Cordillera Mariánica, forming the right-hand side of the basin of the Betis, or Guadalquivir, and the chief part of which is the Sierra Morena; (6) the Penibetic system, extending from the Sierra Nevada to Cape Tarifa.
The highest elevations are: Maladeta (11,004 ft.) and Pico de Nethou (11,168 ft.), in the Pyrenees: Peña de Corredo (8784 ft.), and Moncayo (7593 ft), in the Cantabrian Range; Plaza del Moro Almanzor (8692 ft.), in the Carpetan Range; the plateau of Corocho de Rocigalgo (4750 ft.), in the Toledo Mountains; Estrella (4260 ft.), in the Betic Range; Mulhacen (11,417 ft.) and Veleta (11,382 ft.) in the Penibetic.