Dinefwr Castle (Castell Dinefwr), while on the site of previous castles, is a thirteenth century structure. A round tower within the curtain wall and another in the inner ward remain, some of the buildings have been partially restored. The location is about one mile west of Llandeilo with views over the Tywi valley. The castle can be reached by footpath through the park of Newton Mansion known as Dinefwr Park and is about a mile south west of Llandeilo, Carmarthenshire, Wales.