Hadrian's Wall, stretching about 118 km (73 miles) from the River Tyne in the east to the Solway Firth in the west, was begun around AD 122 on the orders of Emperor Hadrian. Rather than a single wall, it functioned as a carefully planned military landscape: stone and turf walls, milecastles, turrets, forts, roads, ditches, and the Vallum earthwork all worked together.

In 2005 and 2008, Hadrian's Wall, previously inscribed on the World Heritage List, was expanded into a transnational property Frontiers of the Roman Empire, reflecting its significance as part of the broader Roman frontier system. - AsNotedIn