and Gilwern. Llanelly Hill is the north-west hilltop of the Clydach Gorge. It developed as a result of coal mining and limestone quarrying for the nearby ironworks which included the Clydach Ironworks and further west, the Ebbw Vale Ironworks.

Blackrock and Clydach North (which is also referred to as 'Cheltenham') were built up along the turnpike road that ran on the north side of