A medieval weapon rumored to have been used by the brilliant poet himself.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

An abandoned Depression-era zoo hidden just off the highway.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

The island residents are known for taking their quirky sense of humor with them to the grave.

The narrowest house in America is seven feet of pure spite.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A promising candidate for the lost rock laid by George Washington was unearthed, but the hunt is still on.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A much-maligned monument to teetotalism.