Sunrays at the entrance to Taj Mahal Cenote, Chetumal, Mexico.

Sunrays at the entrance to Taj Mahal Cenote

Gallup on sidemount configuration in Nohoch Nah Chich cenote, Quintana Roo, Mexico.

Stalactites form when material drips from the cave ceiling. Nohoch Nah Chich, Quintana Roo, Mexico

El Nido cave in the Philippines is one of the caves where many Hong Kong cave divers get trained and certified.

There are number of "chambers" in El Nido cave - all with different colors.

Blue chamber in El Nido cave.

Blue chamber in El Nido cave.

El Nido, Philippines

Pro-Diver's divers have been pioneers in finding and exploring cave systems in China.

Earning cave diving certification is hard work, but it gets you to places a few people have ever seen. Meizhou, China

Meizhou, China

Taj Mahal Cenote, Chetumal, Mexico

LabnaHa, Mexico

Gallup inspects a very thin column in Nohoch Nah Chich, Quintana Roo, Mexico.

Golden colors in Chac Mool Cenote.

Chac Mool Cenote

Gran Cenote, Mexico

Gallup removes a T-line coming back.

Gallup checks maps to prepare for a dive.

Temple of Doom Cenote (Cenote Esqueleto), Tulum, Mexico

A line arrow pointing to an exit. Chac Mool, Playa del Carmen, Mexico

You may find interesting artifacts in underwater caves.

Temple of Doom Cenote (Cenote Esqueleto), Tulum, Mexico