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.

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

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

More gold than anywhere else, ever.

New York City's smallest piece of private property.

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

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

One of the oldest of its kind.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

This elaborate towering structure was once famed for its revolutionary height.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

Yo, Adrian!

A local prank turned town icon.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

An outlandish shoe shaped house built by an eccentric millionaire.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.