New York's oldest magic store.

A whimsical, but often overlooked clock in Park Avenue.

Plot your trip through the city on the sidewalk.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Walk over a 150 year old manhole.

A prohibition era watering hole for the police.

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

The competition: breathe deeply as long as you can.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The astonishing collection of an infamous criminologist.

Abandoned medieval hill town.