The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The only arched bridge made of stone on the entire Mississippi River.

Perhaps the most scandalous statue of America's first president.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

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.

A cemetery housing wild west legends in South Dakota.

A tunnel with windows, so you don't miss out on the impressive views.

This print shop boasts one of the largest pinball arcades in San Francisco.

Paths are maintained, but trees have taken over plots.

One Confederate statue that accurately reflects the ugliness of its subject.

A hurricane-stricken oak tree has been reborn as a beautiful chainsaw artwork.

A fitting attraction for the corn capital of the world.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A geological mystery on Camelback Mountain.

The most isolated mailbox in America lets desert travelers record their passing.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

At 207 feet, one of the world's longest continuous escalators.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

When flour explodes, it's not a pretty sight.

This shallow cave got its name from copious amount of human bones found inside.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...