The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

It holds a fabulously designed tribute to astronomer Edmond Halley.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

At almost 1,000 years old, this is the oldest known door in all of Britain.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A bit of retro transportation flair preserved in the world's largest department store.

The only Leonardo Da Vinci painting in the Western Hemisphere.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The celebrated eyesore created by starry-eyed sweethearts.

Notorious artist squat renovated into legal studios.

This demon atop the Notre-Dame de Paris looks utterly bored.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

This old-fashioned candy shop, ice cream parlor, and diner served as the setting for one of TV's most controversial series finales.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A historic arena where the Beatles played their first concert in the U.S.

Pilgrimage site for star-crossed lovers.