Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Hear the quietest sound from across the dome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

This statue of the "father of television" stands prominently in the United States Capitol.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

D.C. once had its own tiny rival to the New York Stock Exchange.

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A line of blue paint marks the route of the inaugural parade.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Home to a vast and influential collection of Shakespeareana.

When it comes to handsignals (and colonialism) rock always beats scissors.

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

Washington's iconic carousel has a nice piece of Civil Rights history.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

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

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