This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

An abandoned asylum where patients have been forgotten but their possessions remain.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

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

Tour the oldest unrestored plantation house in America that is open to the public.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

This two-room shotgun shack in Tupelo is the birthplace of a King.

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

The Underground Railroad passed right through this historic Brooklyn Heights church.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Unrepaired walls from a 1920 anarchist bomb attack.

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

The site of the deadly Triangle Shirtwaist Factory Fire.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The middle finger of modernity.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The only museum with its curator—and her pets—buried inside.