The sun famously rises over the Heel Stone at Stonehenge at the Summer Solstice. The alignment was first noticed by the antiquarian William Stukeley in the early eighteenth century, but it is not exact. The summer solstice sunrise, as viewed from the geometrical centre of the monument, actually occurs just to the left of the Heel Stone. During the third millennium BC, when Stonehenge was constructed, the sun would have risen even further to the left. It is therefore likely that the Heel Stone once had a now-missing twin sited to its left, and the summer solstice sun rose between the pair.
Mitchell’s Fold is a stone circle in South-West Shropshire, located near the small village of White Grit on dry heathland between Stapeley Hill to the north and Corndon Hill to the south.It dates to the Early Bronze Age, around 2000 BC. The monument comprises 15 stones arranged in an ellipse measuring 30 m (100 ft.) by 27 m (88 ft.). Originally, there might have been up to thirty stones.
The dolerite stones are thought to have been brought from Stapeley Hill to the northwest and are of a uniform geology. The majority protrude above the turf to an average height of 0.4 m (1 ft. 4 in.); there are two recumbent stones; and three stones are appreciably taller than the rest with heights of 0.9 m (3 ft.), 1.4 m (4 ft. 6 in.) and 1.7 m (5 ft. 6 in.). Aerial photography shows that there is a central stone now hidden below ground. An outlying stone 0.7 m (2 ft 3 in.) in height stands on a small prominence to the southeast.