'Nearly 2,000 years ago, the Antonine Wall was the north-west frontier of the Roman Empire. Built on the orders of the Emperor Antoninus Pius in the years following AD 140, it ran for 40 Roman miles (60 km) from modern Bo'ness on the Firth of Forth to Old Kilpatrick on the River Clyde.  Over time, the industrial and commercial heartland of Scotland has grown around it yet, unbelievably, one-third of its total length is still visible today. Archaeological excavations have demonstrated that much of the rest survives well beneath both fields and urban areas.'

The Antonine Wall Frontiers of the Roman Empire