This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

A nostalgic bibliographic gem.

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

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

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

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

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Home to items never before seen by the public.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

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

Perhaps the most scandalous statue of America's first president.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

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

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The romance of early commercial flight still fills this Art Deco destination.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.