Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."