The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Perhaps the most scandalous statue of America's first president.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

There’s a hidden military meme engraved on the World War II Memorial.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This landmark cemetery in Boston was created more than 300 years ago.

Narrowest house in Boston.

The site of Paul Revere's historic two lantern warning.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

Hundreds of personalized inscribed planks make up this historic boardwalk.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

This replica of the Greek structure is in the heart of Nashville.

The world's longest known cave system.

An abandoned theme park with a strange and tumultuous past.

One of the few surviving "Wigwam"-themed motels.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

A life-sized memorial to Harry L. Collins, the official corporate magician of Frito-Lay.

This abandoned cemetery has a dark past of bodies buried over bodies.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.