The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

A Saint Nicholas-themed ghost town in the Mojave desert.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

The remains of a failed canal can be found in several towns near Lake St. Clair and is known historically as "Mason's Folly."

This icon of the Atomic Age now lays dormant.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The former home of the man whose radical ideas changed the nation.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The first "Hut" was actually a small brick building.

This precariously perched fortress was once ruled by a crow-worshipping baron.

For those late-night mollusk cravings.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The half-mile long structure is so impressive, it even shows up on satellite images.

This ghost town houses the remains of Alabama's old state capital.