The amount of gold ever mined in history could form a cube that would just about cover a tennis court. About half of that has been mined since about 1960. The Spanish still managed to pull gold out of the ground at a greater rate than any entity in history up to their time, and during their peak centuries of production, probably doubled the total world supply of mined gold, not even including the relatively small amounts they lost to shipwreck. It's staggering to contemplate.
A 68 foot cube
Several years ago I watched an episode of a reality show where a group of people went to one of the most remote and miserable places in the world looking for gold. Gold still does something to people when it gets into their head.