The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

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

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.

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.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

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.

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

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

America's first federal monument.

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

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

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

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

An original apothecary from 1792.

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.

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.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

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