O_OO_OO_OO_OO_OMinecraft 1.5 - 1.5.2 Seed
You start out in a snow biome,
Seed Code: O_OO_OO_OO_OO_O
X: 29 / Y: 64 / Z: 103
This is the Line Cavern as mentioned.
X: 51 / Y: 29 / Z: 100
This location is where you get the free gold! Make sure to mine the Iron that was in the giant Line Cavern.