Home to pygmy hunter-gatherers, hundreds of animal and bird species, and the strange okapi, or forest giraffe.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

The world's only facility where orphaned mountain gorillas are cared for.

Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

Deadliest lake in the world suffocated over 1,746 people in one night.

Classical ruins that remember ancient Rome's presence in Africa.

A century-old stone hermitage overlooks this remote pass in the Hoggar mountains, surrounded by a landscape of eroded volcanic cores.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

Considered the most remote point in the entire world.

One of only two civilian settlements in the desolate lands of chilly Antarctica.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

One of the world's southernmost bars.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

Natural time capsule containing an alien ecosystem.

Scattered ruins and a tiny cemetery are all that remain of a failed attempt to colonize the inhospitable Desolate Islands.

French scientists make up the majority of the few humans to occupy this remote island in the extreme southern Indian Ocean.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

A sinkhole known simply as "The Hole."

A 220-foot deep watery drop-off, filled with marine life.

The rusted remains of a victim of Hurricane Ike.