A crumbling hospital from the 1850s on Roosevelt Island.

Unrepaired walls from a 1920 anarchist bomb attack.

Slyly buy a shake in the Parker Meridien lobby.

Visit the monolithic tomb of America's most famous general.

Discover the taste of mold.

A very classy 1920s-era bar right in Grand Central Station.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

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

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.