Now a retreat center for the faithful, it once provided training for clergy—but it began as a farm owned by a famed financier and his opera singer wife, who built a surprise in the backyard.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Inside a state forest, the forgotten remains of a Cold War defensive installation.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

Amazing views of Long Island Sound can be seen from this mountaintop tower.

A once-booming railroad left abandoned next to the Quinnipiac River marshes now intersects with a hiking trail.

The intriguing personal collection of a professional demon-chaser.

This enormous abandoned factory is now a makeshift graffiti gallery.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

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

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

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

This secluded ruin was once a home for exotic plants.

Final resting place of one of the classic authors of horror literature.

137 graves holding New England's earliest residents.

A Manhattan Episcopal church with an eerie underground crypt.

Storage warehouse of the rich and famous.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.