In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

A Gothic cathedral created from volcanic rocks.

A fiery crater has been burning in the Karakum Desert since 1971.

A toxic ghost town sitting atop a massive coal fire.

The second generation of a mighty volcano rises from the sea.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A chapel on a volcanic core, marking the end of a successful journey.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

6000-year-old coal fire moves one meter per year.

A shrine of fire worship built on top of a natural flame.

The world's most remote permanent settlement on an active volcano.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A sulfuric hellscape in southern Italy.

The world's most active stratovolcano is almost always erupting.

This Canary island is a quintessential example of nature’s beauty, and its unbridled fury.

Mysterious hillside with a continuously burning natural fire.

These fantastically named natural pools look like something out of a Scottish myth.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

Three million year old fossils are exposed for all to see on this Icelandic shore.

Alien rock formations grown from the sands of an Australian national park.