This extinct shield volcano is the lightning rod of the Cascades.

Fire meets ice at the southernmost volcano on Earth.

Rising from the sea like a stone monster.

Resonant stone, that has been played since prehistoric times.

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

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

A stunning silver lining to global warming's gloomy cloud.

This "floating island" plateau sits 7,671 feet above the forest floor.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

A remote forest of stone pillars along the Lena river.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A popular tourist cave with a dark past.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

Natural time capsule containing an alien ecosystem.

Astonishing rock formations dot the Brimham Moor landscape.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Bohol's mysterious brown hills.