The ruins of a massive World War I fort overlook the border between Zambia and Tanzania.

A hollowed-out baobab that became the horrific final resting place of leprosy sufferers, with gruesome evidence to prove it.

These strange piles of magnetized volcanic ash travel across the desert about 50 feet per year.

The world's largest bioluminescent area was undiscovered by science until 2005.

All that remains of Jacques Cousteau's 1960s underwater "village."

Annual rush for a sacred desert lake's fish stock.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

The social hall of this former factory is a Communist-era time capsule.

This heart-shaped island looks substantially less lovely after a recent bulldozing project.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Launch site for nuclear war against Western Europe.

A narrow strip of land is home to the tallest migrating dunes in Europe.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

This set of concrete chambers resonates according to different notes of octaves.

This abandoned fighter jet launch center is now a haunting street racing course.

One of the most well-preserved mammoth specimens in the world.

Stalin's prisoner-built rail line sits in ruin, never having a single car ride its tracks.

A little church on a tiny island looks like something from a fairy tale.

Ruins of two abandoned stations destroyed by the power they sought to harness.

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

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

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

Walk 2,300 feet above the ground on the "Troll's Tongue."