The Catskills retreat of naturalist writer John Burroughs.

The former home of a disgraced local priest now hosts a mysterious secret supper club.

A fictional town that was briefly brought to life before fading once again out of existence.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

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

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

This once luxurious Catskills resort is now a haunting ruin.

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

Oldest existing wire suspension bridge in the United States.

A winding, cliffside stretch of road overlooking the Delaware River.

The remnants of a luxurious resort that saw its peak in the 1970s and 1980s has been abandoned since 2009, leaving behind the wreckage of both the hotel and a beautiful ice skating rink.

The largest known open fault in the United States is basically a giant natural refrigerator.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

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

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

The Hudson River School comes alive at this palatial estate.

An enormous cat made of recycled wood scraps.

The small burial plot is located in a mall parking lot.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.