Learn about the last river many crossed to find freedom from slavery in the United States.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

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

This vintage theme park is peak Christmas kitsch—and it's open all summer.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

An expansive and intricately restored mansion remains from over a century ago--and so do its ghosts.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This airfield played a key role in both World War II and the Cold War.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

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

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An optical illusion found amid a logged redwood forest.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This expansive bridge in the Canadian wilderness was originally just built for friends.

The wild west is still alive and well at this authentic mining town watering hole.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.