Roadside collection of 65,000 signs.

A trading post in the North Pole where children send letters.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This massive redwood tree has a hole in the base big enough to drive through.

Golden Gate Park's historic collection of plants.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A hotel and restaurant serving as the mecca of kitsch.

See massive fossils that are over 200 million years old in northeastern Arizona.

When ecosystems collide in the arid Southwest.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

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.

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

A unique geological area spiked with wind-carved rocks that resemble teepees.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

A museum devoted entirely to the rattlesnakes and snake-related art.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

"I did this all while you were watching TV."

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

The World's Largest Bull.

A fitting attraction for the corn capital of the world.

When flour explodes, it's not a pretty sight.