Sunburst... looking from just above the Bronze Age cairn of Twyn Bryn Glas, near Cadair Fawr. Some other local cairns are approximately indicated. Merthyr Tudful sits – believe it or not – just over the ridge, far right of image. A sobering thought.
Image credit: Robert Gladstone
You should check out Garn Ddu - the best cairns in my opinion are Carn Ddu (big) and the Pontsticill ring cairn, but there's dozens of smaller cairns all over that area.