This taxidermy horse was a Civil War hero.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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

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.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

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

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.