In AD122 following the orders of the Emperor Hadrian, work began to protect the north-west frontier of the Roman Empire. Hadrian's Wall was more than just a barricade. Stretching almost 80 miles from coast to coast and featuring mile castles, barracks, forts, ramparts and settlements it is testimony to the vision and skill of the Roman Empire. As the wall approaches its 1,900 anniversary, this programme heads to Northumberland to explore man's relationship with walls and their importance with an archaeologist, artist, naturalist and drystone waller
