Serra da Estrela Natural Park is situated in the largest mountain range of Portugal - the Serra da Estrela, and is the source of the rivers Mondego, Zêzere and Alva. More than half of its area is located above an altitude of 700m, and at 1993m, that the highest peak in continental Portugal is located.
During the Quaternary period, all the region was subjected to the action of ice and once this disappeared visible marks were left on the landscape. Valleys in the shape of horseshoes, ravines, polished rocks and lakes of glacial origin are just some of the formations that demonstrate the importance of the ice and snow in modelling the mountains.

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