A New Jersey state park that was once Napoleon's brother's sprawling estate.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Where America’s first doomsday cult awaited the end of the world.

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

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

Memorial built in 1922 in remembrance of WWI casualties.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

Self-sufficient greenhouse floating on the Hudson River.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

The real-life site of Ichabod Crane's infamous gourd attack.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A waterway covered over after the Industrial Revolution has been unearthed and cleaned up, for the enjoyment of fish and humans alike.

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

This 19th-century building inadvertently preserved the handprints of its builders within its walls.