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

The graffitied ruins stand hidden within the Pennsylvania woods.

An underwater city for the dead.

A layered tribute to the work of mosaicist Isaiah Zagar.

This park contains a number of standing stones meant to heal and inspire.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

A field of nothing but boulders which resembles a giant's gravel driveway.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

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

A surprising museum of 20th-century technology.

Seven people are buried in the middle of what's now a movie theater parking lot.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.