These underwater caves are amazing natural swimming spots hidden ... In total, this entire underground river in Mexico measures about 216 miles (348 km), with a maximum depth of 331-feet (101 m). To ...

Rio Secreto in Cancun was discovered almost two decades ago by complete chance. Now the underground oasis has become a major ...

Explorers in Mexico Discover World's Largest Underwater Cave and It's Filled With Ancient Mayan Treasures. Published Jan 18, 2018 at 10:24 AM EST Updated Jan 18, 2018 at 2:29 PM EST.

Underwater archeologists in Mexico have discovered the world’s largest flooded cave. The Great Maya Aquifer Project (GAM) team – committed to studying the mysterious waters of Mexico’s ...

Clear Lounge in Cozumel, Mexico claims to be the world's first underwater oxygen bar. Clear Lounge — -- Usually, cruisers want to keep their heads above water.