This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

The only remaining historic maritime signal station in the United States.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Abandoned Italianate architecture on the coast of Maine.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The ghostly remains of what was once the world's richest copper mine.

The king of U.S. high points towers over every other peak on the continent.

A massive tribute to this small county's top agricultural product.

The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

A late-night restaurant empire was launched from this humble storefront.

Built in 1785, this residence is the oldest stone house in Georgia.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

The statues commemorate the legendary mass killing of escaped circus monkeys.

Museum preserving torture methods from the past.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A full-scale sculpture of a mermaid and baby grand piano hidden underwater by David Copperfield.