The first declared National Monument in the United States.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

This vintage train once gave new meaning to “swimming upstream.”

This soaring sculpture and Sioux Falls landmark represents the leap of faith taken to make one's dreams come true.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

This massive roadside mascot was the first version of the giant to illustrate his butt.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

"A hideous albatross in the Hudson River Valley."

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

A statue honoring 44 continuous years of greeting passing ships.

Ruins of a Carnegie family mansion on Cumberland Island.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

Paths are maintained, but trees have taken over plots.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

The oldest liquor store in the country is a model of resilience and mischief.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

The crash of this great airship signaled the beginning of the end for dirigibles.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.