The only structure left with direct ties to the Salem witchcraft trials of 1692.

An enormous, inside-out glass globe built in 1935.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

An early-19th-century hotel with a past that is steeped in the Civil War.

Two flush headstones mark the only known graves to be embedded in an airport runway.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

This kitschy tavern is also home to rare early editions of "Treasure Island."

"X" marks the spot of an echo chamber in the middle of a plaza.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Population: 1.

This Wyoming town is fascinated by a particular mythical creature.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A popular rock that acted as a waymarker for American pioneers.

A devilishly named gorge that was a sign of salvation for many pioneers.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.