Margaret and Ron Curtis provide guided tours of all the Callanish sites for visitors, and specialist groups by appointment. The exhibition on archaeo-astronomy is open Monday through Saturday. Fieldwalking continues at the sites and 6 books, 8 mini-guides, several postcards and a short video on the Callanish Stones have been published.
In 2006 the moon was at the end of its 18.6 year cycle. Once a month it is so low on the southern horizon that it can be seen behind the standing stones of all the Callanish circles, thus fulfilling the purpose for which they were built. See Current Archaeology cover numbers 147 and 200 for more information.