Gretna Green is a parish in the southern council area of Dumfries and Galloway, Scotland, on the Scottish side of the border between Scotland and England, defined by the small river Sark, which flows into the nearby Solway Firth. It was historically the first village a traveller would come to in Scotland when following the old coaching route from London to Edinburgh. Gretna Green railway station serves both Gretna Green and Gretna. The Quintinshill rail disaster, the worst rail crash in British history, in which over 220 died, occurred near Gretna Green in 1915.

Elkton is a town in and the county seat of Cecil County, Maryland, United States. The population was 15,443 at the 2010 census. It was formerly called Head of Elk because it sits at the head of navigation on the Elk River, which flows into the nearby Chesapeake Bay. The town constitutes part of the Delaware Valley.