A second highly visible site is an enclosure called Castell Blaenllechog, located just to the west of the farm Pengawsai (itself located to the northwest of the village). It is not certain what the enclosure is, but suggestions include a medieval castle site, a medieval homestead or even an older Iron Age defensive site. What is particularly noticeable are the massive ramparts which stand 3.3 m high. Internally the height is less at about 1.5 m. Traces of a ditch 0.3 m to 0.6 m can be found to the west and south. This enclosure is particularly noticeable on the aerial views from Google Maps.