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

The saddest little diner in New York.

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

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

New York City's smallest piece of private property.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

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

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

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.