This beautiful infra-red black and white image by Gary McCall shows the remains of the Bocan Stone Circle, Culdaff, Inishowen, Co. Donegal. Originally there were 30 stones in all. Sadly, now there are just seven. The circle was 20 metres in diameter and some of the remaining megaliths are over seven feet tall. Also known as Glackadrumman, this monument commands sweeping views of Inishowen and Trawbrega Bay. According to one user at the Megalithic Portal, "The alignment of the circle is E/W and the peaks of Sliabh Sneacht and the Three Paps of Jura may have been used to create this imaginary line. A report in 1816 states that graves have been uncovered at the Bocan Stone Circle and a number of burial pots were also discovered. There are several standing stones are within view of the Bocan Stone Circle." Another user suggests that a large stone in the centre of the structure resembles the "Hag's Chair" stone at Cairn T, Loughcrew. Aubrey Burl says that Boyle Somerville surveyed the ring in 1928. From a 1.5m (5ft) high stone at the SE, on whose inner face he thought there might be very weathered cupmarks, to a higher a the NW, 1.9m (6ft 5ins) in height, he deduced an alignment to the midsummer sun setting behind Farragan Hill five miles away. Half a mile to the SE (Map Ref. C537470), is the ruined court-cairn of Larranghirril, the Druid's Altar. This, claimed John Toland in the early 18th century, was the grave of the druidess, Gealcossa, the white-legged, and not far away was the stone circle, "Her temple; being a sort of diminutive Stonehenge, which many of the Irish dare not even at this day in any way profane". Things have changed.See more here and here and here.