
that whole cave system goes right through the Yucatan peninsula joining up the pools I believe.
( , Wed 7 Jul 2010, 22:30, Reply)

At least not via caves big enough to swim through, but as I understand it they're all around the rim of the Chicxulub crater.
( , Wed 7 Jul 2010, 22:48, Reply)

although watching that made me quite panicky /not good with water
( , Wed 7 Jul 2010, 22:57, Reply)