http://www.pictorymag.com/showcases/in-deep/

Ik Kil Cenote

During an adventure through Mexico, my best friend and I stopped at a Mayan Village called Ik Kil. We were told that there was a cold cenote (or sinkhole) nearby for swimming, but since it was pouring rain, we werenâ€t too excited about it. We opted to go just to photograph the people crazy enough to swim there. The second we saw it, we decided to dive 50 feet into the cold, catfish-filled waters. And then repeat. It remains one of the most magical experiences of my life.
Christina McNeill.