The Antonine Wall (Vallum Antonini) was a defensive wall built by the Romans in present-day Scotland, that ran for 39 miles between the Firth of Forth, and the Firth of Clyde (west of Edinburgh along the central belt).
Antone Wall Map - Hadrian’s Wall is generally thought of as the northernmost border of the Roman Empire in Britannia, but the Romans actually pushed further north into Scotland and built another wall, the Antonine Wall.