A curious friendship between two inanimate ladies.

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

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Cryptic messages embedded in the New York City sidewalk.

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

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.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Wine bottle sculpture with a ship's stateroom inside.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

A living archive of urban activism and space reclaimed.

The first and only carousel with a lineup entirely of insects.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Slyly buy a shake in the Parker Meridien lobby.

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.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

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

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

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

A popular European tradition makes its way to the states on one of America's most famous bridges.

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