Sado Gold Mine
This mine was once the most productive in Japan, producing gold, silver, and copper for the Tokugawa shogunate. After closing in the late 1980s, it has been preserved as a historical museum. Part of the mine's 325 km (250 miles) of underground tunnels, some running as deep as 1,969 feet, are open to the public. For a steep fee, you could don Mixed Reality glasses for a 30-minute walk in the Dohyu Tunnel, to see how Edo-period slaves worked the mine in appalling conditions. A cheaper option is to pay for tech-free access to parts of the Dohyu and Sohdayu tunnels. The mine is a tough 40-minute uphill walk or a five-minute taxi ride (about ¥900) from the bus stop at Aikawa. Three daily Nana-Ura Kaigan buses let you off at the Sado-Kinzan-mae bus stop.
