Archaeology and industrial history buffs should stop halfway up the Great Orme to explore this, the largest prehistoric mine in the world. A 45-minute self-guided tour explains how the ancients turned rock into copper at the smelting site and heads underground for about 200m into 3500-year-old tunnels, dug by people using tools of stone and bone. The site continued to be worked by the Romans, and then from the 17th to 19th centuries, and the entire tunnel network extends for around 4 miles.
