Holbox is one of three interconnected Freshwater Cenotes which have BELL FORMATIONS.. There are no other known caves or cenotes so far in the world which have these. Predominantely they are Stalegtite types but undisturbed over millenia they have developed into swirling Mandelbrote Fractals (swirls within swirls). The cenotes all have inverted mushroom entrances opening up into a massive cap with regular stalegtites on the cave roofs. The Bell are found around and beneath a thin cap of sulphuric acid starting at 24m. They are complicated dives needing extra safety equipment, lines, air and lights, be prepared for a long cold safety stop. Advanced plus divers only. The caves are pristine with visibility excellent.
Facts about Holbox, Ruta de Cenotes, Puerto Morelos, Quintana Roo
It is in Mexico- The typical depth is 0-40 Metres 0-130 Feet.