This titanic steel chain linking two buildings was installed without permission but instantly beloved.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Little Red Lighthouse under the George Washington Bridge.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

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

Hundreds of skulls and bones at the largest skeleton museum in the country.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

An abandoned stretch of highway, deteriorating next to the operational one.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

Pennsylvanian mass grave and possibly mass murder.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

This jail which was in service for over a century is now open for curious visitors.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A failed piece of Orientalism has become the proud symbol of a community.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.