One of these hidden locations is the Waterfall Cave, which can be discovered in the Emerald Stair region. The cave entrance is well-hidden, so finding it can be a bit tricky. However, the location ...

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?

When people hear about crystal clear water in Florida, they usually think of the gorgeous sandy Florida Keys or the emerald-green waters ... you don't have to be a cave diver to enjoy the park.