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

This abandoned boat was left in place thanks to its rotting beauty.

A vast city of the dead, where the deceased outnumber the living by more than a million.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

A huge musical instrument played by the ocean.

The 25th President's marble casket can be visited in this classical Ohio tomb.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

The only presidential monument to display a late POTUS's actual casket.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

Mile-long cave system near Great Smoky Mountains.

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

The island residents are known for taking their quirky sense of humor with them to the grave.

A building so large that it has its own weather.

A bronze ballot box stands at the spot where Susan B. Anthony voted illegally.

The home, museum, and death site of Kodak's influential founder.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.