A full-scale sculpture of a mermaid and baby grand piano hidden underwater by David Copperfield.

One of the most accessible undersea plane wrecks in the world.

Swirling layers of white and red rock earned these mountains their festive nickname.

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

The final resting place for the remains of 143 Habsburg royalty.

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

An Australian lake whose pink hue defies scientific explanation.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

A safe place for the wild donkeys of a hot vacation destination.

A geological oddity topped with a 2,000-year-old pagan temple.

A surprisingly beautiful abandoned World War II military base in East Greenland.

A Cold War atomic camp buried under the ice is now emerging because of global warming.

The 3.8 billion-year-old rock proves that tectonic plates may have been shifting longer than we thought.

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

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

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

Fire meets ice at the southernmost volcano on Earth.

Natural time capsule containing an alien ecosystem.

Some of the smallest works of art in existence.

What was once supposed to be the symbol of a shining Afghan future is now a bombed-out ruin.

Despite a history of destruction, this former citadel survives to document Afghanistan's oft overlooked history.

Splashes of blue in an otherwise monotonous lunar landscape.

Highly unusual subterranean stupa and adjacent cave monastery.