Photograph by @paulnicklen //@cristinamittermeier navigates home after a long day of diving in the caves and cenotes of the Yucatán, Mexico.  Swimming through a gorgeous curtain of light always lets you know that there is open sky and breathing air above.  Please #follow me on @paulnicklen to see more from a recent diving expedition. #adventure #nature #dive #diving @natgeocreative @thephotosociety #gratitude