A unique seaside cave where Aleister Crowley faked his own death.

Massive volcano in the Andes is the farthest point from earth's center.

A swing to dangle you off the very edge.

A turquoise lake within a volcanic crater.

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

A violent name for a violent volcano.

Climbing Iceland's highest peak on the rim of the Oræfajökull volcano.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Rising from the sea like a stone monster.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The youngest volcano in Central America.

An enormous, 30-story-deep hole in the middle of Guatemala City.

Profile of a sleeping person 4km long in 250m high cliffs.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

The highest point in Washington state is a volcano covered in glaciers.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.