The Sierra de Grazalema nature reserve is located between Cadiz and Malaga provinces in Spain. It experiences high rainfall, with some areas receiving over 2,200 mm annually, making it the rainiest place in southern Spain. The reserve contains diverse landscapes, vegetation, and wildlife. It is home to over 1,375 flower species, 200 vertebrate species including endangered vultures, and has a rich cultural heritage with Roman ruins and archaeological remains.