Memorial built in 1922 in remembrance of WWI casualties.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

World Trade Center memorial likened to a woman's sexual organ.

Beautiful stained glass depictions of the history of human flight fill this surprising chapel.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

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

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Eccentric stone cairns built on a public New York City beach.

Townhouse facade doubles as an RMS Titanic Memorial.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

This abandoned factory on the Hudson River once churned out a million bricks a week.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

This once luxurious Catskills resort is now a haunting ruin.

This 19th-century clock has been restored to help withstand the harsh environment of its seaside home.

A monument honoring those who died in the Great Famine of Ireland.

Where the Monitor was launched and ushered in the age of the "ironclads."

This historic church with a connection to "Uncle Sam" is now a fraternity house.

A plaque on a rock dedicated to a famous, forgotten author, and put in an impossible place.

The site of a fallen tree that protected Americans from British forces during the American Revolution.

A tribute to the hard-working men and women of Grumman, who crafted F-14 fighter jets.

This memorial in the Adirondack wilderness honors the accidental death of a Scottish entrepreneur.