This little gem of a museum is a hidden jewel filled with prehistoric treasures.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

The home for all things Kool-Aid offers everything except a chance to actually enjoy the drink.

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

America's smallest town is run by its single citizen/mayor/librarian/bartender.

In the middle of a remote desert town is a surprisingly opulent hotel.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

This Nebraska town wants to double its population with plywood cut-outs of townsfolk.

What do a giraffe, an elephant, and reasonably priced steaks have in common? This roadside restaurant filled with exotic taxidermy.

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

An experimental, automotive replica of Stonehenge.

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

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

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

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

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

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.