Little is known of the enigma that is Hell’s Bells. How were they formed? Why are they found here? Why is there no other dive site quite like this one? There's only one thing I know for sure... you've got to see it to believe it.
A lined ring route has been laid through the bell formations and takes you around the perimeter. The depth on the line varies from 28 to 33 metres. There is one T intersection with the stem of the T extending back into the centre of the circle and tied off to a tree.
If you are diving trimix and head below the hydrogen sulphide expect it to be completely dark below (cave training and technical training highly recommended). There is a line that circumnavigates the debris cone. Scientific studies are being performed below the hydrogen sulphide on the skeleton of a sloth. Please respect the investigation by staying well clear and not touching or disturbing anything with fingers or fins.
A small section of cave has been explored.
Get off the main Cancun-Tulum highway 307 at Puerto Morelos. Travel south on the lane next to the highway and turn right at the road headed inland signposted to Hol-Box. There is a big mustard-coloured concrete arch in the middle of the road with a sign to an Ecopark. Travel 19 kilometres on this road then turn left into a gravel road (big sign post for Cenote La Noria).
Stay on the main wide gravel road for 6.3 kilometres. At one point you turn left. There are signs along the way for Cenote Zapote and Kin-Ha. At roughly 6.3 kilometres on the gravel road turn left at the big Cenote Zapote sign.
Dive site information:
$300 Mexican pesos per person (April 2016) - cash only.
The Hell's Bells formations are found at around 28 metres or 90 feet. The line that circumnavigates the formations goes down to 33 metres or 110 feet. The hydrogen sulphide layer starts at about 35 metres or 115 feet.
Very nice bathrooms, small shop selling snacks and cold drinks, open air showers, two platforms for leaping off into Cenote Zapote, small number of car parks next to site.
The park also contains Cenote Palmas and Cenote El Abuelo - ziplining, swimming, snorkelling, bicycling and tours available.
This dive site is deep and takes you into the overhead environment (and away from direct access to the surface). Some kind of cavern training at a minimum would be sensible, along with a redundant gear configuration and gas planning. Consider 30/30 gas for this site.
People leap off the platform into the water. It's recommended that scuba divers take note of the direction of the far side of the cenote so that you can surface safely away from the platform at the end of your dive.
The Zero Gravity dive shop has a nice cross-section map of this underwater site on their wall. Drop into their dive centre to take a look. They also hire double tanks and do trimix fills. They are located off the roundabout at Puerto Aventuras.
Canon 5D Mark II camera in Sealux housing with 14mm lens and Inon Z240 strobes fired by Triggerfish.