The Mexican government has invoked its national security powers to push forward the construction of a tourist train being built the Caribbean coast, threatening its cave systems.

Zapote Cenote, nicknamed Hells Bells, gives divers the chance to get up close and personal with a rare underwater phenomenon.

These are the greatest places to explore unique geologic formations, according to our annual Readers Choice survey.

A Cabo Pulmo shark encounter becomes so much more when California divers sense the presence of their missing friend.

Marlins are big business in Mexico's Baja Sur, where local scientists and a dive shop are trying to protect the famed fish by swapping sport fishing for snorkel encounters.

Short on time? Dive with Martin can help plan a fun-packed dive trip (of course, you can always stay longer).

Here’s how to reivew a dive shop’s website for sustainable action and four sustainable dive shops operating in Cozumel.

Indonesia, Saba and Cozumel are dive classics reason.

Live in luxury when you dive with any of these boats, from the Galapagos the Maldives.