This giant boulder is pinched over a 1000-meter abyss by two mountains.

This small group of sand dunes manages to pack in a strange rainbow of colors.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

These strikingly barren, rolling red hills were caused by bad farming practices.

The rocks in this arid basin leave trails of movement behind them.

Are these prehistoric metal pipes evidence of alien plumbers? Nope, but they are amazing nonetheless.

The site of a devastating modern-day mud volcano eruption that buried parts of a village.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

This precariously balanced boulder is said to be a hunk of stolen butter dropped by the gods.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The legend says that this English rock formation was once a hunter who was turned to stone by annoyed witches.

These rat eating Giant Malaysian Pitcher Plants may have evolved to eat shrew poop.

A fifth-century temple improbably built into the side of a cliff.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

A limestone wonderland of water and subterranean secrets.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.