Mason-Dixon Line

Fulton Township, PA · est. 1978

Robert Fulton, born in this corner of Lancaster County in 1765, first made his way as a portrait painter in Philadelphia and Europe before turning his restless mind to machines. In 1807 his steamboat—the North River Steamboat, remembered as the Clermont—proved that steam could reliably move a vessel against the current. He also experimented with an early submarine, the Nautilus, floating mines, and improvements to canals.

Harford County, MD

The oldest part of this house went up around 1747, when Henry Scarff settled a Maryland farm and raised a modest four-room dwelling; generations of his descendants enlarged it, adding the tall central block by 1849. In 1929 Harvey S. Ladew, a wealthy sportsman and self-taught gardener, bought the old Scarff place—then called Pleasant Valley Farm—and set about transforming its grounds into one of America's most celebrated topiary gardens, sculpting hedges and yews into fanciful shapes still admired today.

Cecil County, MD

On May 30, 1947, an Eastern Air Lines flight bound down the East Coast went down near this stretch of the upper Chesapeake country, killing everyone aboard in one of the deadliest U.S. air disasters of its day. The crash came during the postwar boom, when commercial aviation was expanding faster than the safety rules meant to govern it. This quiet memorial marks the ground where that loss came to earth.

Aberdeen, MD

Aberdeen Proving Ground opened in 1917 as the U.S. Army's premier weapons and ordnance testing site on the Chesapeake Bay, soon joined by the neighboring Edgewood Arsenal, which became the center of the nation's chemical warfare research. For more than a century the soldiers, civilian scientists, and contractors stationed here have tested artillery, armor, and munitions—demanding and often dangerous work that has cost lives across generations. This monument gathers all of them—uniformed and civilian alike—into a single act of remembrance.