Visit the monolithic tomb of America's most famous general.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

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

A quiet and contemplative oasis in the middle of New York's bustle and riot.

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

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Cryptic messages embedded in the New York City sidewalk.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

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

Love, knishes, and best wishes from this legendary Lower East Side bakery.

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

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

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

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

Bowl in splendor, if you're lucky.

Wine bottle sculpture with a ship's stateroom inside.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Lie in a hammock where George Washington stood.

Plot your trip through the city on the sidewalk.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A living archive of urban activism and space reclaimed.

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

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