Serra da Estrela () is the highest mountain range in Continental Portugal. Together with the Serra da Lousã it is the westernmost constituent range of the Sistema Central and also one of the highest in the system. It includes mainland Portugal's highest point at above mean sea level (although the summit of Mount Pico in the Portuguese Azores islands is higher). This point is not a distinctive mountain summit, but rather the highest point in a plateau, being known as Torre ("Tower" in English). Torre is an unusual summit in that it is accessible by a paved road. The peak has a topographic prominence of and its parent peak is Pico Almanzor, in Spain. The mountain range, situated between the municipalities of Seia, Manteigas, Gouveia, Guarda and Covilhã, is about long and is across at its widest point. It is formed from a huge granite ridge that once formed the southern frontier of the country. Rivers There are three rivers that have their headwaters in the Serra da Estrela: the Mondego, which is the longest river entirely within Portuguese territory; and the Zêzere, which is a tributary of the Tagus; a tributary of the Mondego, the Alva also has its headwaters in the range. It is high. Nature Park The mountain range is now part of the Serra da Estrela Natural Park and offers skiing opportunities in the ski resort of Loriga, Seia Municipality. Serra da Estrela dog The Cão da Serra da Estrela (Estrela Mountain Dog) is a breed of livestock guardian dog that takes its name from this region. Serra da Estrela sheep and cheese Queijo Serra da Estrela (Serra da Estrela cheese) is a soft cheese from the region of Serra da Estrela. The recipe is more than 2000 years old. It is made from cardoon thistle, raw sheep's milk and salt. The cheese is soft and gooey. The cheese becomes harder and chewier as time goes by. The region's ancient bordaleira sheep are also prized for their wool. Cuisine The region's cuisine is well-regarded and includes dishes such as breaded sweet sardines and Juniper beef stew. Smoked meat (fumeiro) and traditional sausages (enchidos) are in abundance, the nettle sausage (alheira de urtiga) among them. Though the region has a very small local Jewish population, it has emerged as a center for Kosher food, with local producers launching kosher versions of their olive oil, wine and cheesemakers