The Roman Empire's wild northern frontier — a wall marching for 73 miles across the neck of Britain, its forts, and the steaming baths of Aquae Sulis.







Nearly 1,900 years ago, the Emperor Hadrian drew a line across the top of Britain: a stone wall, 73 miles long, guarding the edge of the Roman world. This map follows that frontier across its most dramatic crags and best-preserved forts — where you can still read soldiers' letters and stand where legionaries once watched the wild north — and ends at the spa city where Romans bathed in Britain's only hot spring.