Beneath the United States lies a surprising network of caves shaped over millions of years. Some feel almost otherworldly, ...

The infernal environment and the presence of the crystals has required the development of specific equipment and technology, ranging from refrigerated suits to “crystal-friendly ... They formed ...

Here are five thrilling caves adventures promising an unforgettable experience to thrill-seekers and nature-lovers. "Mammoth ...

Imagine swimming in crystal-clear waters ... Here are five of the most breathtaking underwater caves you need to see: One of ...

From a protected cove on Long Island, Dean’s Blue Hole—Earth’s deepest known underwater cave—plunges more than 600 feet into darkness. The entry to South Passage is decorated by ...

Karst Underwater Research A renowned cave diver, who set multiple cave diving records throughout his lifetime, has died while exploring one of the deepest underwater caves in the U.S. Brett ...

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed for four years, will be accessible again this summer. But to get in ...

Beneath the land surface of the Bahamas, the underwater caves known as blue holes stretch for hundreds of miles in all directions. Today, these labyrinthine passages host a variety of tiny sea ...

The underwater caves in Mexico are commonly referred to ... with ancient formations and crystal-clear waters. Cenote diving is an adventurous and unforgettable activity in Riviera Maya, appealing ...

With more than 13 acres of water charted by divers and an extensive underwater ... in darkness. Crystal (Un)clear PathSome of our planet’s most massive and difficult-to-reach caves are still ...

The Crystal Cave in Sequoia and Kings Canyon National Parks in California has been closed since 2023 for maintenance. The cave will reopen to public tours on May 23. Cave exploration is on the ...

After a long hiatus, Crystal Cave in Sequioa National Park is reopening to guests next month with guided tours. It had closed after the road, trail and visitor facilities were damaged in the 2021 ...