An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Walk into the 19th century without leaving Brooklyn.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

An annual extravaganza of Broadway theater memorabilia.

A whimsical, but often overlooked clock in Park Avenue.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Cryptic messages embedded in the New York City sidewalk.

Avoid gangster interaction while window-shopping.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

An artist's cute bronze subway sculptures belie his violent artistic past.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Lie in a hammock where George Washington stood.

This abandoned subway station can still be seen on regular commuter trips.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

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

During the holidays, a vintage subway train whisks New Yorkers back in time.

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

One of the last Jazz Age "Wonder Theaters" in New York City.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

There must be a pun in this haystack somewhere...

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The "Seinfeld" diner.