Sitting unobtrusively near the top of the Great Orme is the largest prehistoric mine ever discovered. Nearly paved over for a car park, this site of tremendous historical importance has been developed as a must-see attraction, with a visitor centre and the chance to explore portions of the 5 miles of tunnels dug over centuries in search of copper. What is truly astounding is that 4000 years ago the tools used to excavate this maze were just stones and bones.

　　A 45-minute self-guided tour explains how the ancients turned rock into copper at the smelting site and then heads underground for about 200m into 3500-year-old tunnels. The site, whose discovery moved Britain's metallurgic history back a mind-boggling 2000 years, was worked again from the 17th to 19th centuries. Last entry is 4.30pm.