This mouldering abandoned mental hospital was once a center for progressive healing.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

This Central New York ghost town was once a prosperous railroad community.

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

An enormous overgrown greenhouse teeming with graffiti and wildlife.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

The headquarters of the famous Yale society.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

Three-story slide through the New Museum.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

The lost town of Neversink, sunk by New York City.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

Oldest synagogue in the United States.

The home of the artist credited with introducing the tomato to the American diet.

A single light illuminates one man's overshadowed contributions to street lamp history.

Mysterious stone tower featured in many alternative histories of the New World.

The tennis legend used this racket while breaking the race barrier and becoming the first Black man to win the US Open.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The oldest still-operating tavern in the United States was once owned by a pirate.