Ruby Falls is one of those places that stays with you long after you leave. Tucked... The post The Tallest Underground Waterfall You Can Visit in the U.S. Hides Inside a Tennessee Mountain appeared ...

Discover the beauty of the nature cenotes of Mexico. Swim, snorkle and take in the stunning rock formations at the Santa ...

Terrence Tysall set a record scuba diving to the Edmund Fitzgerald. Ric Mixter dove in a submersible, finding a missing body. Here are their stories.

The scariest jack-o'-lanterns of the season are carved deep down in the cold and wet of Lake Chelan, 35 feet below the ...

There are hundreds of caves in Belize that served as portals to what the Maya called Xibalba—home to ancient death gods, rituals, and extraordinary relics left behind. Accessible only by kayak or ...

Between the Sinks and the Rise of the Middle Fork of the Popo Agie, the river famously disappears into subterranean mystery.

Running along the Caribbean shores of the lush Yucatán Peninsula, Riviera Maya is a 100-mile (160km) stretch of sands ...

Deep within Vietnam’s Ha Long Bay, explorers uncovered a massive hidden organism that’s challenging everything we thought we ...

Anguilla, a British overseas territory nestled just north of St. Maarten and east of the Virgin Islands, has recently been ...

To someday allow scientists to stay underwater conducting research for days on end, the UK-based company DEEP has designed ...