Married record-holding free divers Christina & Eusebio Saenz de Santamaria explore dive as deeply as one breath will take them. On this excursion, with their Nikon D7000, some natural light, they created these stunning images in the cenotes of the Yucatán Peninsula in Mexico.

Check out their website: One Ocean One Breath » 

See also NEMO 33 - The World's Deepest Swimming Pool