Dryslwyn is a spectacular hilltop castle well worth visiting whilst in the area.
It is a Welsh castle, sited on a rocky hill between Llandeilo and Carmarthen. It overlooks the Tywi Valley with extensive views. It was built in about the 1220s by one of the princes of the kingdom of Deheubarth, and was a site of many feuds as it passed between English and Welsh ownership. It is considered one of the most important remaining structures built by a Welsh chieftain and is a Grade I listed building.