the Guinness Book of World Records names the entire Crystal Cave, which is 35 feet at its widest point and 10 feet high, as the largest single geode in the world. The cave was discovered in 1887 ...

The three-meter tall amethyst geode - a hollow rock filled with amethyst crystals - is the main attraction at the Crystal Caves at Atherton, southwest of Cairns. But it's now missing a bit after a ...

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?

The Cave of Crystals is an underground cavern filled with tree-size gypsum crystals, including some of the largest natural ...

Previously, the world’s largest examples of selenite crystals came from a nearby cavern discovered in 1910 within the same Naica cave complex. Several examples from the Cave of Swords are ...

LOS ANGELES – The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean ... and an underground stream runs alongside much of the cave trail. The last and ...