But one presents itself immediately - Stonehenge is aligned northeast-southwest, and it has been suggested that particular significance was placed by its builders on the solstice and equinox points, so for example on a midsummer's morning, the sun rose close to the Heel Stone, and the sun's first rays went directly into the centre of the monument between the arms of the horseshoe arrangement. It is unlikely that such an alignment can have been merely accidental.