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
Mountains and hills of Scotland hills. The range includes many of the highest mountains in the British Isles, including Ben Nevis and Ben Macdui the two highest. The Cairngorm Plateau is the highest, coldest and snowiest plateau in the British Isles. The southern and eastern parts of Scotland are usually referred to as the Scottish Lowlands, but these areas also have significant ranges of hills, although these are lower than the Highland mountains. Because they are much closer to towns and cities, they are more popular for hill walking and rambling than the more distant mountains of the northern Highlands. In addition to the main