佐渡ヶ島の西側、下側のコブの真ん中辺りですね。
佐渡金山は上のコブの真ん中あたりです。
車ならすぐですけどねー。

It's on the west side of Sado Island, smack in the middle of the bump on the bottom. The Sado Gold Mine is smack in the middle of the upper bump. You get there soon enough by car, though.