"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

The site of the first "historically true" UFO encounter in the U.S.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

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

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

Inside Crosswicks Creek Park resides an estate chronicling 200 years of history.

For decades, it has disappeared and reappeared as water levels rise and fall.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

"Where the ducks walk on fish."

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

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

An Irish Memorial commemorating those who perished due to potato blight.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

It would take 35 firetrucks to fill this enormous glacial pothole.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

This Central New York ghost town was once a prosperous railroad community.