The very extensive Nerja Cave network is in Malaga Province, Spain. Evidence of human inhabitance stretches back 50,000 years. The pathways and chambers go for 5 kilometers in a region that is about 700 meters wide. Each of the galleries and rock formations have names, based on our perception of what the formations look like. To make the formations over the millenia, rain water percolating through marble rock brings carbonic acid, which creates cracks and channels that become caves, and drip along the way to make the shapes seen in this gallery.