 The lowland heath habitat is very rare, occurring only at a handful of sites.The Mid Cheshire Ridge rises abruptly in the middle of the plain, with a high point of 227 metres; its Triassic sandstones are exposed at the Raw Head geological site.Two extensive sites, Goyt Valley and Leek Moors, lie at the eastern edge of the county and the south-western end of the Pennines, within the South West Peak natural area of the Peak District.