Mason and Dixon, Pennsylvania

Maugansville is a census-designated place (CDP) in Washington County, Maryland, United States. The population was 2,295 at the 2000 census.

Cearfoss is an unincorporated community and census-designated place in northwestern Washington County, Maryland, United States. Its population was 178 as of the 2010 census. Cearfoss is located northwest of Hagerstown and Maugansville, near the Pennsylvania border. Many highways intersect in Cearfoss in a roundabout, including Maryland routes 58, 63 and 494. Cearfoss is officially included in the Hagerstown Metropolitan Area (Hagerstown-Martinsburg, MD-WV Metropolitan Statistical Area).

State Line is an unincorporated community and census-designated place (CDP) in Antrim Township, Franklin County, Pennsylvania, United States. It is next to the Maryland state line along Interstate 81 and U.S. Route 11 between Hagerstown, Maryland, and Greencastle. As of the 2020 census the population was 2,804.State Line was originally called Middleburg, and under the latter name laid out in 1812, and named for its location between Greencastle and Hagerstown, Maryland. The present name comes from the fact that the community is located on the Maryland-Pennsylvania state line. A post office called State Line was established in 1830.

Hagerstown Regional Airport (IATA: HGR, ICAO: KHGR, FAA LID: HGR) (Richard A. Henson Field) is in Washington County, Maryland, five miles north of Hagerstown, Maryland and a half mile (800 m) from the Maryland/Pennsylvania border. The airport is off Interstate 81 at exit 10 and U.S. Route 11, not far from Northern Virginia, South Central Pennsylvania, and the Eastern Panhandle of West Virginia. The Federal Aviation Administration says this airport had 29,105 passenger boardings (enplanements) in calendar year 2019, 14,373 in 2020, 23,227 in 2021 and 32,197 in 2022. The National Plan of Integrated Airport Systems for 2023-2027 categorized it as a "non-hub primary commercial service airport" based on 2021 enplanements.

The Hagerstown Aviation Museum is an aviation museum at the Hagerstown Regional Airport in Hagerstown, Maryland. It is focused on the history of the Fairchild Aircraft Corporation.

Johnston is an unincorporated community in Franklin County, Pennsylvania, United States. It is located in Antrim Township.

The Spring Grove Farm and Distillery is an historic, American farm complex and distillery site that is located in Antrim Township in Franklin County, Pennsylvania, USA. It was listed on the National Register of Historic Places in 1979.

Antrim Township is a township in Franklin County, Pennsylvania, United States. The population was 15,778 at the 2020 census, an increase over the figure of 12,504 tabulated in 2000. It was named after County Antrim in Northern Ireland.

Martin's Mill Covered Bridge is a public, historic wooden covered bridge located at Antrim Township in Franklin County, Pennsylvania, United States. Martins Mill has dawn to dusk hours of 8 AM - PM. It is a 205-foot-long (62 m), Town lattice truss bridge, constructed in 1849. It crosses Conococheague Creek.It was listed on the National Register of Historic Places in 1974.

Fountainhead-Orchard Hills is a census-designated place (CDP) in Washington County, Maryland, United States. The population was 3,861 at the 2000 census.

Broadfording is an unincorporated community in Washington County, Maryland, United States.