Cumbria is predominantly rural and contains the Lake District National Park, a UNESCO World Heritage Site considered one of England's finest areas of natural beauty, serving as inspiration for artists, writers, and musicians. A large area of the south-east of the county is within the Yorkshire Dales National Park, while the east of the county fringes the North Pennines AONB. Much of Cumbria is mountainous and it contains every peak in England over above sea level, with the top of Scafell Pike at being the highest point in England. An upland, coastal and rural area, Cumbria's history is characterised by invasions, migration and settlement, as well as battles and skirmishes between the English and the Scots. Notable historic sites in Cumbria include Carlisle Castle, Furness Abbey, Hardknott Roman Fort, Brough Castle and Hadrian's Wall (also a World Heritage Site).