Environment, Videos, zNew Headline Video: International team of cave explorers ‘dive’ into the world’s longest explored underwater cave system in Mexico May 29, 2013, 4:55 PM 0 LatinaLista — Ox Bel Ha is the longest explored underwater cave system in the world. Located in Quintana Roo, Mexico, it measures a little over 150 miles in its underwater passages but also has within its system dry caves,…