The best destinations for winter dive travel and solo divers. Plus: caverns for open water divers.

Quintana Roo, in Mexico’s Yucatán Peninsula, insured about 100 miles of coastline to protect the reef, which generates about $6.2 billion a year in regional economic activity.

Here are great dives in from Cabo San Lucas to Loreto Bay National Marine Park.

Scuba divers will revel in the challenges of Mexico, Indonesia, the Great Lakes, and other sites selected by our. readers as the world's best advanced dive sites.

The endangered whale shark is as mysterious as it is enormous. Here’s how you can swim with whale sharks in Mexico.

From Australia's Coral Greenhouse to the Cozumel Underwater Museum, his sculptures are transforming coral reefs and ocean conservation policy.

Know what to expect before you travel, and why vaccinated travelers will have an easier time entering Thailand and the Bahamas.

Mobula ray populations are declining worldwide. Here’s how to leverage your tourist dollars and join a citizen science expedition to help save the rays.

Travel contractions in Cozumel, Boracay, and Sipadan offer a rare glimpse into its impact on small islands. Is Cuba's tight control of Gardens of the Queen a better model?