El Torcal de Antequera is a nature reserve in the Sierra del Torcal mountain range located south of the city of Antequera, in the province of Málaga off the A45 road in Andalusia, Spain. It is known for its unusual landforms, and is one of the most impressive karst landscapes in Europe. The area was designated a Natural Site of National Interest in July 1929, and a Natural Park Reserve of about 17 square kilometres was created in October 1978.[Source]