Here’s how. Collins is considered “one of the greatest cave explorers of all time,” according to the National Park Service. He discovered Great Crystal Cave in 1917, which his family ran as a show ...

Visitors seeking unique and quirky attractions should explore America's largest man-made crystal cave, located in the city's Memorial Park Cemetery. The Crystal Shrine Grotto, a 60-foot deep art ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

U.S. News Insider Tip: Café Olé, just outside the Crystal & Fantasy Caves, has one of the best fish sandwiches on the island. A sun hat is essential because you'll sit in the garden while they ...

Once submerged under the sea millions of years ago, the Cayman Crystal Caves were shaped by water erosion, creating rooms filled with stalagmite and stalactite formations. Over time, dripping ...