The death of Floyd Collins one century ago is being remembered as a catalyst for the formation of Mammoth Cave National Park, ...

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 ... when the cave was ...

Crystal Cave was opened to tourists soon after it was discovered. However, tours were originally offered by boat. Now, you’ll ...

Horseshoe Bay Cave, located under Frank E. Murphy Park in Egg Harbor, stretches over 3,103 feet, having been carved into the ...

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 ...

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?

Inland blue holes, however, are unlike any other environment on Earth, thanks largely to their geology and water chemistry. In these flooded caves, such as Stargate on Andros Island, the reduced ...