Bodmin Moor

Bodmin Moor is a granite moorland in northeastern Cornwall, United Kingdom. It is in size, and originally dates from the Carboniferous period of geological history.
Bodmin Moor is one of five granite plutons (underground masses of igneous rock) in Cornwall.
The name 'Bodmin Moor' is fairly recent, invented in 1813. It was formerly known as Fowey Moor after the River Fowey which rises within it. Since the mid 18th century Bodmin Moor has been crossed by the trunk road now known as the A30.
Geography.
Dramatic granite tors rise from the rolling moorland: the best known are Brown Willy, the highest point in Cornwall at , and Rough Tor at . Considerable areas of the moor are poorly drained and form marshes (in hot summers these can dry out). The rest of the moor is mostly rough pasture or overgrown with heather and other low vegetation.
The Moor contains about 500 farm holdings with around 10,000 beef cows, 55,000 breeding ewes and 1,000 horses and ponies. Most of the moor is a Site of Special Scientific Interest (SSSI) and has been officially designated an Area of Outstanding Natural Beauty (AONB), as part of Cornwall AONB.
Rivers and inland waters.
Bodmin Moor is the source of several of Cornwall's rivers: they are mentioned here anti-clockwise from the south.
Inland waters on the moor include Dozmary Pool (Cornwall's only natural inland lake) and
three reservoirs, Colliford Lake, Siblyback Lake and Crowdy reservoir which supply water for a large part of the county's population.