Imagine, 150 meters of underwater swimming on a single breath through a narrow cave system, with at times only your flashlight to counter the darkness. This is Carlos Coste setting the Guinness World Record for “Longest distance swam underwater with one breath (open water)” in the Sistema Dos Ojos caves on the Yucatán Peninsula in Mexico on November 2, 2010. Read The Telegraph
Here is another video from the same event with Carlos Coste himself presenting