AKTUN TUYUL CAVE SYSTEM, Mexico (AP) — Mexico’s outgoing leader has rapidly built a train system looping around the country’s southern Yucatan Peninsula. President Andrés Manuel López ...

The caverns house North America's largest cave chamber, "the Big Room," which boasts a floor area of 8.2 acres — equivalent to more than six football fields. The caverns sit within the Guadalupe ...

A judge in Mexico has ordered the temporary suspension ... would harm the jungle it will now run through and the network of caves which lies beneath it. Getty Images Speleologists have warned ...

We lay 1,200 feet, more or less, beneath the desert, down countless rope pitches and miles of tortuous passage from the single entrance to Lechuguilla Cave in New Mexico's Carlsbad Caverns ...

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 ...

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 ...

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don their caving gear and descend into caverns like Lechuguilla and Mexico's Cueva de Villa Luz ("Cave of the Lighted House"). They go in search of bacteria that gobble up hydrogen sulfide gas and ...