This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.

Perhaps the most scandalous statue of America's first president.

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

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

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

An unassuming secret door once led to a legendary watering hole.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

New York's oldest magic store.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

The home of one of America's most beloved fictional characters has become a real world landmark.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This former crime corner has been turned into an eclectic community center.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A place for ship-lovers to watch the passage of freighters traversing the Great Lakes while learning about their history.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A hidden "place of interment for gentlemen."

A modern zoetrope on the New York City subway.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.