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

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

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

This pun was simply waiting to come to life, and one defense contractor made it so.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

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

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

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

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

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.