Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

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

In this relatively flat state the highest point is an honored place.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

The summit Roosevelt conquered before he descended to become The Chief.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

The highest point in Connecticut was incorrectly memorialized before surveyors discovered the actual spot.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"

A statue high in a hill that represents how Buffalo Bill got his name.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

This artsy public restroom is shaped like a giant john.

A unique attraction and museum dedicated to exploring iconic roadside structures.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.