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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

An underground magnet for ever-changing street art.

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

Ruins of a Carnegie family mansion on Cumberland Island.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Outsider art meets paleontology at this roadside reptile repository.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

More than five miles of underground passageways.

Hear the quietest sound from across the dome.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A celebration of capitalism in Midtown.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

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