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

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A whopping 14,000 copper coins cover this miniature fighter jet.

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

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

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

A super-sized promotional trick that is now a D.C. landmark.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

A historic cemetery filled with quirky faux wood art and unique tombstones.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

The system of air guns are fired off remotely to scare any trespassing avians.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

A young state senator's deathbed plea to be buried inside a rock resulted in this unusual grave site.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

A 14-foot monument marks the resting place of two of the town's earliest residents—and one unknown soldier.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

Burke’s oldest cemetery also houses the victim of the county's grisliest murder.

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.

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