A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.

A massive sustainable farm designed by the mastermind behind Central Park.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A celebration of capitalism in Midtown.

Bowl in splendor, if you're lucky.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

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

A semi-scholarly approach to sex.

Walk over a 150 year old manhole.

Plot your trip through the city on the sidewalk.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

An unrealized dream to wirelessly electrify the entire Earth.

This locally-famous crevasse in New York State is icy all year round.