The oldest surviving botanic garden in the United States.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This castle was once the home of one of the most powerful women of the Renaissance.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

These passages carved from the Antarctic ice hold strange shrines to the harsh southernmost climes.

Natural time capsule containing an alien ecosystem.

Now home to nothing but a weather station and a landing strip, a group of enslaved people were marooned on this tiny island for 15 years.

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.

The best place to encounter plants and animals that can only be found in New Caledonia.

Marvel of green building techniques that sings with the wind.

Megapodes incubate their eggs using the heat of an active volcano on this Pacific isle.

The cafe that acts as the social hub for the small volcanic island of HMS Bounty fame.

The watery grave of Captain Bligh's famous ship.

An unmarked, overgrown path through dense vegetation leads to the largest ancient structure in Polynesia.

The "Mother Temple of the Pacific Islands" stands at the center of 20 acres of lush, tropical prayer gardens.

A failed utopia, shut down by a more legitimate nation.

A massive trilithon nicknamed "Stonehenge of the Pacific."

This volcanically volatile island town is home to an abandoned series of tunnels left by the Japanese during WWII.

Two World War II aircraft lie within the jungle around this abandoned runway.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

Tropical paradise strewn with hundreds of World War II wrecks.

Final resting place of the most prolific Fijian cannibal of all time.

Museum of Fijian history, including its former tradition of cannibalism.