Northumberland National Park
is the northernmost National Park in England, extending from Hadrian's Wall at Hexham and Haltwhistle up to Kielder, Rothbury and Wooler and the Scottish Border. Built in Roman times, when Hadrian ruled and ordered the erection of the most heavily fortified border in the Roman Empire, Hadrian's Wall now a has UNESCO World Heritage Status and the majority can still be accessed by foot or on National Cycleway. The whole wall lies in England, 1km south of the Scottish border in the west and 110km south in the east. Northumberland also hosts the majority the Pennine Way stretching 268 miles of the Pennine Mountains along the backbone of England, from the Peak District through the Yorkshire Dales and over Hadrian's Wall to the pre-historic rolling landscape of the Cheviots. Kielder Water is the second largest lake in England and the largest man-made lake in Northern Europe. The lake is surrounded by Kielder Forest Park, covering 250 square miles, the largest working forest in the UK.