A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

This is one really big nut.

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

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

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

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

The state bird of New Mexico, constructed entirely out of garbage.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.