An overlooked memorial honoring the local Washington residents who died in World War I.

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

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

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

This one-room cabin where the young colonel slept during the French and Indian War.

Built by the patriotic residents of Boonsboro in a single day.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

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

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

Go take a picture with the inventor of the daguerreotype photographic process.

A blooming house of worship for the masses.

This poor little statue is the most vandalized memorial in Washington.

A line of blue paint marks the route of the inaugural parade.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

An unexpectedly extraterrestrial room in a former Victorian resort club.

There’s a special club house at the top for the bell ringers.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

Look closely and you’ll notice that the color changes a third of the way up the tower.