In 1974 civil parishes in Wales were abolished and replaced by communities. The community of Cynwyl Gaeo contains the villages of Caio, Crugybar, Cwrt-y-Cadno, Ffarmers and Pumsaint. Caio or Caeo is a large rural parish located between Llandovery and Lampeter, about 1 mile north-east of the A482 that connects these two towns.
The parish church, dedicated to St Cynwil, stands on the narrow main street at the centre of the village, near the Roman road that once linked the Roman forts at Llandovery and Llanio with the gold mines at nearby Dolaucothi. The Roman road remained in use until the late 18th century, mainly as a cattle-road or Drover’s road. The Dolaucothi estate is now a tourist attraction owned by the National Trust.
The present church building, still of 90% medieval fabric, is the largest in the benefice. It was built by the community of Talley Abbey and is thought by some to be the original mother church of the area, the Cantref Mawr. It has a Celtic dedication and has links to the 5th Century Saint, Paulinus, the teacher of St David. Local groups use the church as a venue for fundraising events; most recently a concert in aid of the village playing field. The Vintage Tractor Society also uses it on occasion as a starting point for one of their sponsored drives with refreshments provided by the ladies from the church.
In addition to the regular Sunday worship, the Caio congregation holds a Harvest Thanksgiving, a Christingle service and Christmas Midnight Mass. In the summer they have their annual sponsored walk and picnic.
Away from the Church, the village pubs in Caio and Ffarmers field pool and darts teams. The pub in Caio also holds a weekly all comers quiz on a Monday night and the Old Age Pensioners Luncheon Club on a Friday. There is, annually, village sports in Caio, a carnival, craft and produce show with sports in Pumpsaint, and an agricultural show in Cwrt-y-Cadno. The Urdd, YFC, WI and Merched y Wawr are all active in the area and contribute to the social fabric of the community. There are six Chapels in the parish as well as the Church. A large proportion of the inhabitants are Welsh speaking.