"A hideous albatross in the Hudson River Valley."

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Reforestation in action is the main attraction in this abandoned quarry.

The poet's been ambling through these New York woods since 1940.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A bit of retro transportation flair preserved in the world's largest department store.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

A semi-scholarly approach to sex.