The main settlements of the community are: Llanelly Hill, Blackrock,
Clydach, Maesygwartha 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 the river between
Govilon and
Merthyr Tydfil. Clydach South developed on the south side of the river above the ironworks. It climbs the north-west slopes towards Llanelly Hill. Gilwern is located at the mouth of the
River Clydach, where it meets the
River Usk. Maesygwartha lies between Clydach and Gilwern along one of the many tramroads in the gorge. ==History==