Morlais Castle is on an Iron Age Hill Fort site. Remains of the thriteenth century catsle include the ground floor and vault, round keep, towers and various buildings. It is located about two miles north of Merthyr Tydfil off the A465 and overlooks the Taf Fechan. Further information on the history of this site and images can be seen on the Castles of Wales website a link to which is given below.