Caio, Carmarthenshire
Coordinates: 52°02′29″N 3°55′58″W / 52.041504°N 3.932784°W
Caio or Caeo is a village in the county of Carmarthenshire, south-west Wales, sited near to the Dolaucothi Gold Mines.
It is located between Llandovery and Lampeter, 1 mile (1.6 kilometres) north-east of the A482 that connects these two towns. Caio lies at the confluence of the Afon Annell and the Nant Frena. It forms part of the parish of Cynwyl Gaeo. In former times it gave its name to Cayo Hundred.
The parish church, consecrated to Saint Cynwyl, now stands at the centre of the village, near the Roman road that linked the Roman forts at Llandovery (Alabum) and Llanio (Bremia), and the Roman gold mines at Dolaucothi. The Roman road remained in use until the late 18th century, mainly as a cattle-road or Drover's road. The Dolaucothi Estate long held by the Johnes family is now a tourist attraction owned by the National Trust. A pounding-stone long known as Carreg Pumsaint and a possible holy well are located nearby.
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