This is one of the pictures of my series about unexplored caves in San Luis Potosí, México.I spent a few weeks there exploring caves, and this place doesn't even have a sign or a road to get there.The rappel is a 220 meter descent.The cave is surrounded by trees, so actually if you don't know it is there you could fall inside. It was an absolutely amazing experience, knowing that I had the privilege to be one of the adventurers that actually could be there, feels like the center of the Earth.