A group of divers have connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet, a discovery that could help shed new light on the ...

Mexico. Although it’s not entirely underwater, part of this stunning cave includes an underwater pool that is perfect for swimming and diving. The cave is famous for its sheer size, with an ...

Sótano de las Golondrinas, or Cave of Swallows, is the largest pit cave in the world — an over 1,200-foot drop from top to bottom. It's also home to thousands of birds, who spiral out of the ...

swimming and access to a small bar of refreshing drinks and fruits, and an "Amazing Underground Adventure" that takes you through caves where you can snorkel and see a range of incredible rock ...