This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

From scholastic to sepulchral - now under reconstruction.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

Now the site of a high school, this was almost the location of the largest cathedral in the US.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

An eccentric artist's abode in this small Italian town has been transformed into a surreal temple of mosaic madness.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Enormous lake at the bottom of a unique cave system.

This folk art compound was built by a fortune teller on the advice of three people from the future.