Top 5 greatest treasure troves ever hidden

Have you ever gone into the countryside with a metal detector, hoping to unearth a Saxon gold ring or a hoard of ancient coinage? Treasure seeking is as normal to humanity as taking a breath, but more often than not leads to frustration, because all you find are old nails or worthless lumps of tat. How would it be, do you suppose, to find something so valuable that it set you up for life?