This tree has witnessed nearly 1,000 years of history.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

More than 100 steam and diesel locomotives bring Colorado’s rail heritage to life.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

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

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."

A cemetery housing wild west legends in South Dakota.

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

A surprising collection of bronze faces beneath a bridge in Loveland.

Step into a pastel time capsule where candy is truly dandy.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A memorial to the most decisive Native American victory of the Plains Indian War.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A museum dedicated to the history and exploration of both popular music and science fiction.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.

Illegal drag racing two stories beneath Chicago’s streets.