Limestone caves with spectacular showcase chambers.

What is the Thing?

Miniature art that tells an enormous story.

The Magical World of George Phar Legler.

America's only nuclear missile silo open to the public.

A Saint Nicholas-themed ghost town in the Mojave desert.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Stroll through a wonderland of stupendous moss-covered trees.

Couple's personal collection of pinball machines turned public pinball museum.

Traditional 15th century Chinese garden in the middle of Vancouver.

A quaint Russian village in the middle of a German metropolis.

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

An operating lighthouse from the 1860s.

A mysterious "wedding cake" castle in the middle of the urban desert.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A stealthy Apache hideaway that became the haunting site of a mass grave.

An urban laboratory.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

This parking garage has given itself over to graffiti artists and the neighborhood can't thank them enough.