Alexander Hamilton’s creation caused quite a bit of controversy.

One of the oldest of its kind.

A daily replay of the experiment that proved the rotation of the Earth.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

The abandoned coal loading dock is a canvas for unsanctioned art.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Yo, Adrian!

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

The oldest surviving botanic garden in the United States.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

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

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

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

This huge clock made of flowers and simple machinery was once used a political weapon.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

Unique tower has outlasted a takeover of the company.