Arthog Stones is a Bronze Age monument set on a terrace nestled in the hills above the Mawddach Estuary. It has been separately interpreted as a stone circle, a burial cairn, and also as a stone row.

The monument consists of ten surviving stones, although a recumbent lies nearby in a field, and other stones may have been repurposed in the field walls. The farmer is also said to have unearthed buried stones during ploughing.

Of the remaining stones, four form what appears to be an alignment adjacent to a distinctive quartz boulder. Five other stones from an arc slightly to the west. The stones range in height from about 1 meter to roughly 0.5 meters.

This is a confused jumble of stones, and it's easy to see how it's been interpreted in different ways over time. While pleasant enough in its own right, what makes it special is the lovely walk up from the nearest lane, the spectacular views towards the Mawddach Estuary and Barmouth in the west, and the dark and brooding presence of Braich Ddu rising to the east. This is an absolutely fantastic site and well worth the effort to seek out.