Mining of gold and copper at the legendary Osarizawa mine began around 1300 years ago, with the last of the smelting facilities closing down in 1978. Now the site is owned by Mitsubishi, who run guided tours around the highlights and a museum for 1,000 yen. More awesome stuff at MichaelJohnGrist.
Ever played S.T.A.L.K.E.R.?!?