Bizarre living fossil only grows in a small chunk of the Namib Desert.

Welded sphere dropped from space.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

The most alien-looking place on Earth.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Bolivia's needle-like rock formations.

Largest site of dinosaur footprints ever found includes more than 5,000 tracks.

70,000 empty bottles of Coke comprise an ad seen only from the air.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Marikina's record-breaking loafers.

Bohol's mysterious brown hills.

The longest living non-clonal organisms on Earth.

The world's first and only natural nuclear reactor.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A haunting collection of the vanished and disappearing natural world.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

An ancient iron pillar in Delhi that seems to be rustproof.

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

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

Native Americans built this circle of stones, which was used to predict astronomical events.

Astronomical observatory above Lake Titicaca.