ENGLAND // Walking the Hadrian's Wall Path, a delightfully wild 135km- long (84-mile) trail running coast-to-coast across England, you'll appreciate how desperate the Romans were to stamp their authority on northern Britain. Built between AD 122 and 128, and named after the emperor who ordered its construction, Hadrian's Wall was an amazing feat of engineering, even by Roman standards. It stretches from Wallsend in the east to Bowness-on-Solway in the west. After each Roman mile (roughly 0.9 of a modern mile) a guarded gateway called a milecastle was built, each meticulously numbered. The remains of several of these can still be found along the wall, as well as several forts and a total of six museums that explain its history. Housesteads is a well-preserved fort with great views and a museum, while Segedunum has a fascinating exhibition exploring daily life on the wall.