Blaenavon is a town and World Heritage Site in southern Wales, lying at the source of the Afon Llwyd. The town lies high on a hillside and has a population of 6,349 people. Blaenavon grew around an ironworks opened in 1788, part of which is now a museum. The Blaenavon landscape constitutes an exceptional illustration in material form of the social and economic structure of 19th century industry.