The Torcal de Antequera Natural site, which covers over 20 square kilometres including 1,171 hectares of protected land, is the most impressive karstic landscape in all Europe. As if it were a city carved from stone, the interior contains blocks of rocks, passageways and labyrinths of alleyways, mimicking an array of diverse sculpted figures. The most impressive example is the Tornillo del Torcal (“Torcal Screw”) Natural Monument, whose unusual appearance is similar to that of a screw and which is symbolic of the Torcal de Antequera Natural Site. This natural space contains a rocky landscape formed by a process of sedimentation which took place over millions of years. The deposition and the accumulation of animal skeletons and remains was compacted under the sea until these large hills were formed. After the tectonic plates struck together, this block was compressed to the point where it emerged from the ground in a slow process which continues to the present day. An abundance of water is essential to the process of erosion, and there are a dozen streams in the surrounding area. The Torcal de Antequera Natural Site is divided into several parts: Sierra Pelada, Torcal Alto, Torcal Bajo and the Carihuelas and Cortijo of Navazo Verde. The natural space has two hiking trails: the green route and the yellow route. You can find all the necessary information about this natural site at the Visitor Centre.