This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

A sculptural commentary on capitalism pokes up from the East River.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Phil Mortillaro uses keys to bring art back to the Village.

Join in a Seance at the Swedenborgian Church.

100 massive sculptures in the Hudson River Valley.

19th century cemetery hidden in Brooklyn's Prospect Park.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

A mysterious echo seems to defy the laws of acoustics.

Why have you never heard of the second most popular tourist site in New York?

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

This small, hidden cove is home to abandoned boats.

A forsaken wonder in the middle of the East Side neighborhood.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Three acres of mythology-inspired sculptures are visible from the highway.