The largest self-built castle in the U.S., six decades in the making.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

World's smallest skyscraper, the product of a remarkable con.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

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

A modernist landscape of water and sci-fi concrete.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

Belly up to the bar in Cowtown, don't forget to buy some boots.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A toxic ghost town sitting atop a massive coal fire.

On the Hudson resides one of the largest clocks in the world.

Step inside Lucy, the world's largest "elephant."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A unique sculpture park that specializes in the huge and bizarre.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

According to the experts at the Guinness World's Record office, this is the longest candy counter in the world.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

A tomb with a window to ensure the interred wasn't buried alive.