A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

An abandoned 1930s gas station turned bustling neighborhood park.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

A faux European lane smack dab in downtown L.A.

Inside this library, the history of Los Angeles is retold through a mural.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The legendary building that needed ghostly approval before being built.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

Historic funicular railway, believed to be the shortest railroad in the world.

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

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

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

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

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

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

For almost a century, this East Village newsstand has served egg creams to beats, hippies, punks, and everything in between.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.