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

A winding district gerrymandered into the shape of a mantis.

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

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

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.

An original apothecary from 1792.

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

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

The site of the climactic scene from the classic horror film is now a historic landmark.

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

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

Situated in a bustling intersection, this "mobile" monument that honors local veterans from five different wars has moved several times but appears to have found its final resting place.

Through a gap in a chain link fence behind an auto shop is one of Arlington’s oldest family cemeteries.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Home to a vast and influential collection of Shakespeareana.

The Bong-area park police have asked visitors to please, stop stealing the signs.

A secret greenspace hides atop a Capitol parking garage.

The national park was once a plantation estate.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

A spectacular tribute to statesman and philanthropist Andrew Mellon.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.