Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

Brett Hemphill, a noted diver, died while exploring Phantom Springs Cave in Texas, officials say. Screengrab from Facebook post by Karst Underwater Research. A renowned diver recently died while ...

Weeki Wachee Springs State Park in Florida has enchanted visitors since 1947 with underwater performances by "real" mermaids.

Brett Hemphill, a record-setting cave diver from Florida, died in Texas while exploring one of the deepest underwater cave systems in the U.S., according to a Facebook post from Karst Underwater ...

A well-known record-setting cave diver with decades of experience died in Texas while exploring one of the deepest underwater cave systems in the nation. Brett Hemphill, 56, was on an expedition in ...

Thai cave rescue hero Aussie Richard Harris talks to News Breakfast about his new deep cave diving documentary.

A renowned diver recently died while exploring an underwater cave system in Texas, believed to be the deepest of its kind in the United States, researchers say. Brett Hemphill, of Florida, began his ...