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Clydach Gorge


The Clydach Gorge (also known as Cwm Clydach) is a steep-sided valley in south-east Wales down which the River Clydach flows to the River Usk. It runs for 5.6 km from the vicinity of Brynmawr in Blaenau Gwent eastwards and northeastwards to Gilwern in Monmouthshire. The Gorge was one of the first locations in the region to be industrialised though it still retains spectacular natural beauty. It has long been an important transport corridor between Abergavenny and the lowlands of Monmouthshire and the northeastern quarter of the South Wales Coalfield. It is now exploited by the A465 Heads of the Valleys trunk road which runs between Abergavenny and Swansea and which serves the Heads of the Valleys sub-region.

The Gorge is included within the Brecon Beacons National Park and is a tourist destination in its own right, with facilities including a picnic site, waymarked footpaths, the National Cycle Network and car parking alongside the River Clydach, easily reached from the Heads of the Valleys Road. It includes Smart's Bridge, a cast iron bridge and the remains of a late 18th century ironworks which are now a Scheduled Ancient Monument. There are also limeworks.

The industrial town of Brynmawr sits at the head of the gorge and the large village of Gilwern sits at its foot in the Usk valley. Although development along the gorge and its sides is semi-continuous, the linear settlements of Clydach (now Clydach South), Blackrock, Cheltenham (now Clydach North) and Maesygwartha can be distinguished along the roads between Brynmawr and Gilwern, mainly to the north of the river. The settlement of Llanelly Hill occupies the northwest hilltop of the gorge.


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