Peek through the gates at this oasis from the city, full of Old English charm.

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

A hands-on traveling collection of the innovative devices of yesteryear.

Read a book next to a Midtown waterfall.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

A terrific purveyor of natural history objects and curios.

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

This old-fashioned candy shop, ice cream parlor, and diner served as the setting for one of TV's most controversial series finales.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Step inside Lucy, the world's largest "elephant."

Whimsical artist house in the New Jersey woods.