Mountains and hills of England the land rises to form the Cheviot Hills, which extend into Scotland and could probably be considered part of the Southern Uplands. They are included in Northumberland National Park, along with Kielder Water and the Kielder Forest. The North Pennines (an Area of Outstanding Natural Beauty, or AONB) lie south of Hadrian's Wall, and east of the Lake District, from which they are separated by the Eden Valley. These are younger rocks, mostly Carboniferous limestone, and the mountains are characterised by shallower slopes covered with moorland vegetation, culminating in Cross Fell at . South of this, the main line of
England–Scotland football rivalry Scotland. Joe Baker was the first player to play for England without having played in the Football League, but his was an isolated example because he played at a time when a player was only allowed to play for the country of his birth. Those rules have subsequently been relaxed and the sons or even grandsons of Scots are now allowed to play for Scotland. This means that some footballers born in England have played in "and for" Scotland, including Andy Goram and Stuart McCall. There was an influx of English players to the Scottish league during the late 1980s