"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

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

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

Right next to departures—how convenient!

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 narrowest house in America is seven feet of pure spite.

A former major munitions plant that has been converted into a sprawling art space.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

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

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

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

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

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

The former home of the man whose radical ideas changed the nation.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

The only tennis court that falls under the jurisdiction of the central bank.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

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