The world’s longest underwater cave is amazing

NBC News Channel

TULUM, Mexico - A group of divers has connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet. The discovery could help shed new light on the ancient Maya civilization.

The project dedicated to the study and preservation of the subterranean waters of the Yucatan Peninsula, said the 216-mile cave was identified after months of exploring a maze of underwater channels.

The cave system was discovered near the beach resort of Tulum. The Yucatan Peninsula of Mexico is studded with monumental relics of the Maya people, whose cities drew upon an extensive network of sinkholes linked to subterranean waters.

Some of the underground waterways held particular religious significance to the Maya, whose descendants continue to inhabit the region.

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