A small and somewhat hidden memorial to 68 local veterans of the Vietnam War.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

One of few surviving standpipe water towers in the U.S.

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The oldest continuously occupied public building in the United States.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

This interpretive path lets you get up close and personal with dinosaur bones.

The fifth-longest natural arch in the world, and the longest outside China.

Oddly shaped rock formation, misassociated with a nearby utopian community.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

The graffiti-covered ruins of an abandoned trading post in the middle of the Navajo Nation.

Ancient pueblos built into the base of a natural canyon wall.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This ghost town was once a cult-like religious utopian settlement.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

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

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The real-life site of Ichabod Crane's infamous gourd attack.