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

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

Abandoned power station once home to a squatter community, now being developed into an arts center.

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

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

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

Peek through the gates at this oasis from the city, full of Old English charm.

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

The oldest surviving synagogue in New York City is now a soaring art space.

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

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

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

The "Seinfeld" diner.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Ride the subways of yesteryear.

New York City's smallest piece of private property.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A dilapidated dock tells the story of Titanic's missed arrival.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Tucked in the back of this amazing antique store is an important piece of medical history.

Mountain where Jesus was first tempted by the Devil.

An unusual but excellent display created in the 1930s as propaganda against the Freemasons.