"Covão da Ametade" was once a glaciar lake. Now it is filled with sediments and became a very plesant an beautiful plain. It is underneath "cantaro Magro" rock formation and it is in the start of the biggest glaciar valley in Europe ending in Manteigas villageSerra da Estrela Natural Park is situated in the largest mountain range in Portugal - the Serra da Estrela, and is the source of the rivers Mondego, Zêzere (tributary of the Tagus), and Alva. The park is the largest natural conservation area in Portugal and occupies about 1,000 km². More than half of its area is located above an altitude of 700 m. At 1,993 m it contains the highest peak in Continental Portugal (named Torre) and a ski resort (named Vodafone Ski Resort).