Comprised of thousands of cave temple carvings this cornucopia of ancient Chinese stone art is unrivaled anywhere in the world.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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.

Visit the site of a subway powered by nothing more than air--and lots of it.

Gang fights don't just happen on the streets, they happen under them too.

A crumbling hospital from the 1850s on Roosevelt Island.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A hidden "place of interment for gentlemen."