Swansea Valley yr Ogof Caves, claimed to be the largest show cave complex in Western Europe. South of Abercrave, the valley was formerly a region of heavy industry including coal mining and iron-making and there is plenty of the industrial heritage surviving; the Swansea Canal was built along the valley in the late 18th century to serve the nascent local industries. In 1878 opera singer Adelina Patti made her home at Craig-y-Nos Castle. Swansea Valley The Swansea Valley (), one of the South Wales Valleys, is the name often given to the valley of the River Tawe area in southern Wales, United
Lower Swansea valley river and continued in production until 1745. (It reopened as a pottery in 1764.) In 1737, the White Rock copper works at Pentrechwyth was established. By 1780 there were three copper works on the east bank of the river: White Rock, Middle and Upper Bank. On the west bank there was also one at Forest. By 1800 nine copper smelters were in production in the valley. By 1860 the lower Swansea valley was smelting two thirds of the copper ores imported to Britain, and changes in the output and economy of the Swansea valley had a significant effect on global