Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

A retro walk through the history of the tube.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

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

The king of U.S. high points towers over every other peak on the continent.

A miniature world of concrete and stone in Springfield, Ohio.

This magnificent Cincinnati graveyard is also a popular public park.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Commonly referred to as the most photographed Victorian home in the United States.

The Grand Canyon of Texas.

Rare recess caves fill this unbelievably beautiful Ohio park.

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

A castle built by an eccentric medieval enthusiast in rural Ohio.

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

Less a museum than a bizarre fantasy world created by artists and engineers.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The largest earthwork effigy in the world.

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

The world's longest known cave system.

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

Where beautiful signs live on forever.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.