Hi Captain!
Angelita is 99% open water, but it does have a small OH environment which most guides never go into. It is a bit off the beaten path and not crowded at all, most divers that have experienced it love it. You will not need any overhead training to participate in this dive.
This site is more of a sinkhole than a cavern as there is very little overhead environment. It is among divers' favorites because of its maximum depth of 180 ft/55mt and an incredible phenomenon that occurs at about 100ft/30mt. At that depth, there is a very dense cloud of hydrogen sulfide which looks like chocolate milk. At about 110ft/33mt, you will be below the cloud in crystal clear salt water but there will be no sunlight since it is absorbed completely by the cloud. The experience is very unique. This dive is suitable for advanced divers. We recommend that you combine this dive with Grand Cenote or Calavera.
Let me know when you are interested in going so I can help you organize it.
Hope this helps!
Karla