There’s a hidden military meme engraved on the World War II Memorial.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The most decorated dog of World War I is preserved in the Smithsonian.

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.

A computer bug so primitive it was an actual insect.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

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

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

Right next to departures—how convenient!

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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.

The former home of Thomson Francis Mason, the mayor of Alexandria from 1827-1830.

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

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

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

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.