Cave formations and underground pools at Cave of the Mounds. Wisconsin is home to 50 state parks and 18 National Natural Landmarks. We’ve also got a village known as the troll capital of the world!

The Crystal Cave Hiding Beneath A Mountain In 2000, miners working in Naica, Mexico came across an incredible discovery 951 feet under a mountain in the Chihuahuan Desert. The crew, who were ...

After a four-year closure due to natural disasters, Crystal Cave in Sequoia National Park reopened to the public in time for Memorial Day, the unofficial start of the summer.

The cave, heated by magma along the fault lines that run under the mountain, sits at a steamy 113-122 degrees Fahrenheit with humidity ranging from 90-100%. That kind of environment takes a huge ...

Crystal Cave in Sequoia National Park, California, reopens for the season, offering guided tours and a magical underground experience after a 4-year closure.

Deep in the farthest reaches of Pettyjohn Cave, we stumbled upon something incredible - a massive cluster of crystals tucked away where few people go. This video documents the journey through ...

Crystal Cave in Sequoia and Kings Canyon National Parks, CA will be closed in 2022 because of road damage from fires, Sequoia Parks Conservancy announced.

The Cave of Crystals in Chihuahua, Mexico, is buried almost 1,000 feet (300 meters) beneath Earth's surface and contains giant gypsum crystal beams that are up to 37 feet (11 m) long.