This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

Slyly buy a shake in the Parker Meridien lobby.

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

A hands-on traveling collection of the innovative devices of yesteryear.

The site of the deadly Triangle Shirtwaist Factory Fire.

New York City's smallest piece of private property.

Nope, not Washington Irving's house.

The most confusing clock in New York.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

After surviving abandonment, this powerful Latin American mural is alive again.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A whimsical, but often overlooked clock in Park Avenue.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

A very classy 1920s-era bar right in Grand Central Station.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

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