Carnglaze Caverns
> Location: England
The Carnglaze Caverns cover 65 acres of woodland in the Cornwall section of England. The site is used for music and comedy performances.
Indian Echo Caverns
> Location: Pennsylvania, USA
The Indian Echo Caverns in Hummelstown, Pennsylvania, have been drawing tourists since the 1920s. The caverns were formed out of limestone 440 million years ago and are home to bats, bears, and raccoons.
Nerja Caves
> Location: Spain
The Nerja Caves, in the province of Málaga region of Spain, feature paintings on rock formations from the Paleolithic era as well as the world’s largest stalagmite.
Cave of the Crystals
> Location: Mexico
This cavern full of giant crystals in the state of Jalisco was discovered in 2000 by miners after they pumped water out of a cave nearly 1,000 feet under the Sierra de Naica Mountain. The largest of the selenite crystals, which grew uninterrupted for at least half a million years, are 36 feet long and three feet thick.
