A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

An artist's cute bronze subway sculptures belie his violent artistic past.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Ride the subways of yesteryear.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

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

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

A semi-scholarly approach to sex.

A crumbling hospital from the 1850s on Roosevelt Island.

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

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

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

A local landmark with generations of spraypainted messages, and more being added each day.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This haunting tombstone comes complete with a heartbreaking story of love and loss.