A crumbling hospital from the 1850s on Roosevelt Island.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Elevated freight railway turned wildly successful urban park.

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

One of only two commuter aerial tramways in the United States.

Read a book next to a Midtown waterfall.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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.

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.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

This semi-hidden Manhattan restaurant is based out of a loading dock.