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

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

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

City Council meetings still happen in this historic building, impeccably preserved on the inside.

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

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

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

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

The national park was once a plantation estate.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

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

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The rogue roots are gradually consuming some of the historic marble grave markers.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

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