An unassuming secret door once led to a legendary watering hole.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

New York City's smallest piece of private property.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A museum and doll store featuring a surreal and super sanitized version of where babies come from.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

A unique book shop with a collection of rare tomes and a nostalgia museum.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Dothan, Alabama has been invaded by scores of anthropomorphic peanuts.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A man's home is his castle.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.