These circular depressions created by the partial subsidence of the land abound in the limestone soil that constitutes the Torcal de Antequera Natural Park and which extends over 1,171 hectares.
The rocks found there are over 150 million years old and come from the accumulation of marine sediments. They are limestones, dolomites and soft gypsum very sensitive to erosion and soluble in water. The action of rain, wind and snow has shaped the landscape by dissolving carbonates and leaving only the points where the minerals are most resistant standing. Thus, gorges, caves, corridors and chasms have been created that adopt curious shapes. The sinkholes are filled with the clay remains produced in the wear; At the bottom, the decalcification clay accumulates, known as terra rosa because of its reddish color.
In this rugged and arid terrain, rupicolous vegetation predominates, adapted to the cracks and fissures of the rocks. The caves are also a refuge for vultures, owls and owls.
