This memorial honors five journalists who were killed in a mass shooting in 2018, and affirms the importance of the first amendment.

The only one-room schoolhouse remaining in Talbot County, Maryland.

This methodist cemetery is slowly receding into the wilderness along a Maryland highway.

A winding district gerrymandered into the shape of a mantis.

The oldest military monument in the United States.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

Just outside the Naval Academy, Hell Point is a historical marker that could easily be the point where failed students wait for the bus.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

The only public swimming pool in Baltimore open to Black Americans during segregation is now a permanent memorial art exhibit.

A rural colonial settlement that contains the remains of a store and cooper.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.

This bell is one of the last remnants of the lost city of Triadelphia.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

The Decoy Capital of the World.

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

A Maryland museum dedicated to Black history, housed in a historic church.

The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

Its diverse collection of computers and technology spans the ages.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

The United States' oldest Episcopal church still in active use.

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

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.