The Zêzere valley is a perfect example of the strength of glaciers to sculpt landscapes. With a 10 km long U-shaped cross-section between Covão da Ametade and the town of Manteigas, the valley has a succession of covons, glacier bolts and suspended valleys in its upstream sector, and several types of glacial deposits , fluvioglacial and slope. At the height of the last glaciation, the glacier reached a thickness of 340 meters here, fed by the ice field of the Plateau da Torre. A little further downstream, the Zêzere valley was also fed by glaciers from the suspended valleys of Candieira and Covôes (GF31). The deepening of the current valley and its rectilinear character result from the erosion having been facilitated along the great tectonic alignment that is the fault of Bragança-Vilariça-Manteigas-Unhais da Serra.