Our tour group was small—just five people—which I found out was a good thing. Crystal Grottoes Caverns doesn’t have all the large, open rooms you might recall from other cave tours.

Most visitors praised the informative tour guides and the breathtaking crystal formations ... The last tour leaves at 4:30 p.m. Admission to one cave costs $24 for adults and $10 for children ...

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?

Once submerged under the sea millions of years ago, the Cayman Crystal Caves were shaped ... First, visitors do a 45-minute guided tour of the open-ceiling cave, the roots cave and the lake ...