Mason–Dixon line - Wikipedia

South of the Mason-Dixon Line

US Geography: What is the Mason-Dixon line? - Quora

Mason-Dixon Trail - Wikipedia

Why is the Southern U.S. called Dixie? - Quora

Mason-dixon line, Enregistrer le 61% caractère magnanime

Mason-Dixon Trail - Wikipedia

Union Monument in Vanceburg - Wikipedia

The Wikipedia entry for the Erie Canal doesn't show Maryland as separate from Pennsylvania : r/geography

Liberal Arts Blog — Pennsylvania (Part One): Geography, William