In Wales's highest mountain range, mines and quarries are now worked by climbers, cavers and industrial archaeologists - all indebted to those who once toiled here. Show more
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In Wales's highest mountain range, mines and quarries are now worked by climbers, cavers and industrial archaeologists - all indebted to those who once toiled here. Show more
BBC Two is a lively channel of depth and substance, carrying a range of knowledge-building programming complemented by great drama, comedy and arts.
