The majority of the world's population has never heard of the great blue hole before. (greatbluehole.com)
There are only 2 dive centers, you can dive the famous blue hole, local dives and wall dives. (diveshopmexico.com)
From the incredible geological formations to the unique marine life which live in the caves, the ocean blue holes offer us some of the best diving experiences in the world. (smallhope.com)