<P> Smaller areas of lead exploitation included Halkyn Mountain in Flintshire and in the Clyne valley in west Swansea . </P> <P> Although arsenic is not a metal it has been mined in association with metals and in Wales commercial extraction has probably only occurred in the Clyne valley near Swansea </P> <P> Copper mining is probably the oldest known mining activity in Wales with documented evidence of Bronze Age mining on the Great Orme near Llandudno and at Copa Hill in the valley of the River Ystwyth in Ceredigion . Further copper discoveries were exploited in Snowdonia just to the east of Beddgelert where the Sygun Copper Mine, within the Snowdonia National Park, gives an idea of the conditions faced by copper miners and is a popular tourist attraction . In the 18th century the massive deposits of copper together with a range of other metals was discovered and exploited at Parys Mountain on Anglesey . </P> <P> Gold was mined as early as the Roman period at Dolaucothi in Carmarthenshire and possibly elsewhere . In the 19th century gold was being extracted from a number of small mines at the southern end of Snowdonia with most activity centred in the valley of the River Mawddach and its tributaries . </P>

Where in wales did copper mining take place