Hadrian's Wall is the largest, most spectacular and one of the most enigmatic historical monument in Britain. Nothing else approaches its vast scale: a land wall running 73 miles from east to west and a sea wall stretching at least 26 miles down the Cumbrian coast. 

Alistair Moffat considers who built the Wall, how it was built, why it was built and how it affected the native peoples who lived in its mighty shadow. The result is a unique and fascinating insight into one of the Wonders of the Ancient World.