View from Titterstone Clee Hill on 22nd July 2020 in Cleedownton, United Kingdom. Titterstone Clee Hill, sometimes referred to as Titterstone Clee or, incorrectly, Clee Hill, is a prominent hill in the rural English county of Shropshire, rising at the summit to 533 metres above sea level. It is one of the Clee Hills, in the Shropshire Hills Area of Outstanding Natural Beauty. Most of the summit of the hill is affected by man-made activity, the result of hill fort construction during the Bronze and Iron Ages and, more recently, by years of mining for coal and quarrying for dolerite, known locally as dhustone, for use in road-building. Many derelict quarry buildings scattered over the hill are of industrial archaeological interest as very early examples of the use of reinforced concrete. Several radar domes and towers operate on the summit of the hill. The largest of the radar arrays is part of the National Air Traffic Services NATS radar network, and covers one of 30 overlapping regions of UK airspace. The one on Titterstone Clee monitors all aircraft within a 100-mile radius.