This church is known as "The Home Church of George Washington and George Mason."

This homestead was occupied by Union soldiers, who believed the owners were signaling Confederate forces.

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

A piece of the Ludendorff Bridge, also known as Remagan Bridge, calls this military base home.

The U.S. Army's giant warehouse of war art includes Hitler’s watercolors and Norman Rockwell oil paintings.

One of the Treasury Building's original columns now sits as a garden monument in the middle of a busy military base.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

The FBI's urban training course may have the highest fake crime rate in the world.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

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

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

Though his role as the inventor of baseball may be up for debate, fans still festoon Doubleday's grave with baseballs.

Recorded as the first person buried in Arlington Cemetery.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

The romance of early commercial flight still fills this Art Deco destination.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

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

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.