When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This spectacular track has run continuously since 1882.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

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

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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A technicolor place of worship for Elevationists.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A macabre tour of Hollywood’s deadly history.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

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

Inside this museum, the history of the Walt Disney Family empire is on full display.

This hidden amusement park is a magical escape for kids and kids-at-heart.

This hidden fire lookout offers spectacular views of Sequoia National Park.

A trail weaves through the verses of a poem illustrated by stone sculptures inspired by Native American pictographs.

A unique piece of graffiti offers a little slice of local history and mystery.

Each winter this underground cave forms a dazzling ice palace.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.