The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

New Orleans' famous cemetery, located on the site of a former race track.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A bizarre roadside attraction and the first instance of miniature golf in the world.

An abandoned relic of the city's failed experiment with below ground transit.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

An essential stop before plundering, BYO Cutlass.

The largest self-built castle in the U.S., six decades in the making.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

One part antique store, one part curiosities hodge-podge.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The ghost town that ended up on Ebay.

This charmingly homemade amusement park has been growing for 40 years.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Where America's first doomsday cult awaited the end of the world.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Outsider Art Community.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

A self-built castle made by a mysterious man.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

A beautiful 62-acre Catholic shrine and botanical garden.