Sygun Copper Mine

Snowdonia National Park (Parc Cenedlaethol Eryri)

This mine dates from Roman times, although extraction was stepped up in the 19th century. Abandoned in 1903, it has since been converted into a museum, with a half-hour self-guided underground tour containing dioramas that evoke the life of Victorian miners. You can also try your hand at metal detecting (£2.50) or panning for gold (£2). It's located a mile northeast of Beddgelert, along the A498.

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