Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

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

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

America's first federal monument.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

Within this lovely Richmond cemetery lie the remains of famous Virginians and some of Edgar Allan Poe's most beloved family and friends.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

Decades before the scandal, this staircase on the river was a literal "water gate."

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

There’s a hidden military meme engraved on the World War II Memorial.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

This 25-foot-tall statue was built as a protest to a property dispute.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

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

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

A small Richmond island dotted with the remnants of hundreds of years of history.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.