The time-worn remains of this castle, overlooking a loop on the River Teifi, were once inhabited by Sir Rhys ap Thomas, friend of Henry VII. It had its share of excitement in the Civil War, when held for the king and blown up with gunpowder at the close of the struggle. There are remnants of some of the walls and the ruins of the gate. It is significant as the only native Welsh castle to be built in stone in this part of Wales.