One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Vikings and Evangelicals have both had a hand in this replica medieval church.

This pebble beach is so beautiful that taking its rocks is against the law.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

One of the most controversial statues in Romania is an emperor with no clothes.

This once-derelict building is now one of the most beautiful bookstores in the world.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A small town Romanian cemetery filled with darkly humorous gravestones.

Go take a picture with the inventor of the daguerreotype photographic process.

Before Nixon, "watergate" meant canals.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

The oldest continuously operating fish market in the United States.

Decades before the scandal, this staircase on the river was a literal "water gate."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Art deco landmark on the outskirts of Washington, D.C.

The most accurate timepiece in the world.