The dive to the Blue Abyss in the NoHoch Nah Chich
system (now part of Sac Aktun) passes through a series
of stunning formations and entertaining restrictions.
Diving in the Tux Kapaxa system requires an unpleasant
hike through the sweltering jungles of Mexico, but the
huge, highly decorated cave system is one of the best
cave dives in the entire world.