The Portuguese Republic (Portuguese: República Portuguesa) is a democratic republic located on the west and southwest parts of the Iberian Peninsula in southwestern Europe, and is the westernmost country in continental Europe. Portugal is bordered by Spain to the north and east and by the Atlantic Ocean to the west and south. In addition, Portugal includes two archipelagos in the Atlantic, Azores (Açores) and Madeira Islands.
Continental Portugal is split in two by its main river, the Tagus (Tejo). To the north the landscape is mountainous in the interior areas with plateaus, cut by four breaking lines that allow the development of relevant agricultural areas. The south between the Tejo and the Algarve (the Alentejo) features mostly rolling plains with a climate somewhat warmer and drier than the cooler and rainier north. The Algarve, separated from the Alentejo by mountains, enjoys a Mediterranean climate comparable with Morrocco or Southern Spain. Other major rivers include the Douro, the Minho and the Guadiana, similar to the Tagus in that all originate in Spain. Another important river, the Mondego, originates in the Serra da Estrela (the highest mountains in mainland Portugal - 1,991 m).
The Portuguese coast is extensive, it has 943 km for continental Portugal, 667 km for the Azores, 250 km for Madeira and the Savage Islands . The coast has fine beaches, the Algarve ones are world famous. In Porto Santo Island, a dune formation appeals to many tourists. An important feature on its coast is the Ria de Aveiro (near Aveiro), a delta 45 km in length and a maximum of 11 km in width, rich in fish and sea birds. There are four main channels, between them several islands and islets, and it is where four rivers meet the ocean. A sort of narrow headlands formed a lagoon, seen as one of the most remarkable hydrographic features of the Portuguese coast. Portugal possesses one of the largest exclusive economic zones (EEZ) in Europe, covering 1,727,408 km².