Carreg Coetan Arthur is a neolithic dolmen near Newport in North Pembrokeshire, Wales. Carreg Coetan Arthur dates from around 3000 BC and is the remains of a Neolithic burial chamber. The remains consist of a 4-metre-long capstone on smaller supporting rocks. It would have originally been earth covered, but this has eroded away. The site is managed by Cadw and it is a scheduled ancient monument.