Caves of Nerja in the Province of Málaga,Spain ,,, photo by Ximo Serra ,, Approximately 5 million years ago, during the Upper Miocene, water penetrated the fissures of the marble rock and dissolved it, forming a huge subterranean cavern. Seismic movement and landslides during the Holocene forced the water to find new pathways through the cave system and began the formation of the giant stalactites and stalagmites that can be seen in the cave. Skeletal remains found in the caverns indicate that they were inhabited from about 25,000 BC up until the Bronze Age. Cave paintings from the Paleolithic and post-Paleolithic eras have been discovered on the walls of the cave. For about 4,000 years from 25,000 BC the caves were used seasonally by a small group of humans, and were occupied by cave hyena during the periods that the humans were absent. By 21,000 BC the human population had taken up year-round residence in the caves and had increased in number. A culture based on hunting in the local area had evolved, illustrated by first cave paintings found in the cave which date to around the time. Pine nuts and snails were also important elements of the diet. Up until around 10,800 BC the hunting culture continued to develop with more prey species being taken, including goats, rabbits, fish and marine mammals. A wide variety of animal bones, shells and fish bones from this time have been found in the cave, including the remains of a number of off shore species, along with stone and bone tools. By 4500 BC domesticated animals were being kept and the area around the cave was being used for farming and the production of pottery. By 3800 BC textiles and more advanced styles of pottery were being produced and parts of the cave were being used as a burial chamber. info wiki