A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

These abandoned grain silos and tunnels are an urban exploration dream.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

Illegal drag racing two stories beneath Chicago’s streets.

No one knows how many bodies are in this vault in a Chicago public park.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This "little gallery in the middle of nowhere" is housed in a 170-year-old horse barn in the Missouri Ozarks.

A floating museum that was sunk by a flood and left to rot in the tides.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

An abandoned factory along the Mississippi coated by a giant mural.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

An urban forest overtakes what was the greatest failure of utopic urban housing.

A big museum full of little worlds.

The red brick house where the father of rock 'n' roll wrote some of his classic hits.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Metal water storage tank turned ethereal concert hall.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.