Llyn Cregennen cairn lies approximately 650 meters NE of Hafotty Fach. It is a robbed cairn which now appears as a horseshoe-shaped mound of turf-covered stone, measuring 8.6 meters in diameter. This may be the cairn from which a cist was removed in 1853.
Source: National Archaeological Record Card SH61SE/14. RCAHMW 11.06.2008