A multi-storied adobe complex has been inhabited for more than a thousand years.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

A clear blue swimming hole with hidden caves, still unexplored.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A reproduction of earth's many biomes.

An abandoned town centered around a paper mill powered by a large waterfall.

This three-chambered cave is the only protected natural bat hibernaculum in Quebec.

The little house that stood up to a disastrous flood has become a symbol of perseverance.

Despite its name this unique art piece was established to commemorate a tragic flood.

This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

The falls were named for the mistaken idea that they were the ones pictured on the Canadian $5 bill.