Abstract
A topographical and geophysical survey of the druids' Altar was carried out for the yorkshire Dales National Park Authority in 2007. Several different interpretations of the site have been put forward in the past; the surveys identified additional evidence to support its identification as a Bronze Age Four Poster stone circle, including an outlying stone not previously recorded. A detailed examination of the horizon and view from the site suggest a deliberate choice of location, from which midwinter sunset and the southernmost setting of the moon coincide with prominent horizon features.