English â CofleinThe site of a Roman fort midway between Cardiff and Gelligaer set on rising ground above the western shore of the North Lake at Caerphilly Castle (NPRN 94497). Excavations in 1963 on the remains of the seventeenth century Caerphilly Redoubt (NPRN 300400) https://coflein.gov.uk/en/site/301345/details/caerphilly-roman-fort