This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

This erect, phallic geological spire wasn't always named so domestically.

Millions of dollars worth of sculpture decorate this Iowa city center.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

Home with Gothic windows featured in a famous painting.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

The site of one of history's most indelible and horrific tragedies.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

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

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

The highest bridge in America was built for an almost unnervingly small amount of money.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The only diamond mine in the world where you can keep what you find.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

A small burial plot formerly stranded in the middle of a road.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.