Site 18 is located in a modern farmyard right beside the road. Circle 17 is just on the other side of the cottage.
It has been pointed out by several commentators that this site and Site 17 show how lax Irish planning laws have been. The circle actually touches the cottage - a farm has been built around it. I suppose we should be thankful that the circle has survived. As can be seen from the photo, which is taken from the road, the monument is a raised mound with a stone circle.
Twenty Five of a probable 35 stones remain in the circle, which is 11 meters in diameter. There is a smaller inner circle, 8 stones of which are visible, with a diameter of 6 meters. What Wood-Martin and Petrie refer to as a cist in the centre of the circle is the remains of a small roofless dolmen. There is evidence of a passage opening to the east. Finds included a piece of flint, a fossel, and some cremated bone. Details below.
Borlase: - No. 18 (1). Situated 20 paces to the S. of 16 (dolmen-circle?) two dolmens). "This circle resembles 14 in every respect. It is 40 feet in diameter has an inner circle, as usual, of smaller stones, and a cromleac, now ruined, in the centre. It appears to have had a second cromleac, or kistvaen, within the circle. Of the external circle twenty-nine stones remain, and the original number appears to have been 35." - Petrie.
Site 18 with sheep.
"The cromleac has totally disappeared since 1837. Of the outer circle, twenty-four stones are in situ. Several excavations in various parts of the area were attempted, and at length a small cist (which, from the ground-plan, appears to be a double one, viz. a narrow chamber on the W. side, opening into a larger one on the E. side) was laid bare." Both portions of it, according to the plan, are not more than 10 feet long taken together. "In it were found seven small fragments of calcined bones, a fossil of the Sligo limestone formation, and a small flint arrow-head." - Wood-Martin.
No. 18 (2) (3) (4) Between 15 and 19, "there is every reason to believe that three or more circles have been removed, as the peasantry allege." - Petrie. "The wall for some distance on the S. side of the road is formed partly of boulders, such as generally go to the formation of these structures. In close proximity there is an appearance of a ruined cist." - Wood Martin.