The exact location can be found by doing a little research of the forums.
In this chest you'll find
1 Diamond pickaxe, shovel, axe, sword, garden hoe.
1 fishing pole, 1 flint and steel, 1 shears, 1 bucket, 1 clock.
1 set of Diamond armor and diamond horse armor.
64 birch planks, 64 sticks
1 ender chest, 1 saddle, 1 craft table, 1 bed
64 diamonds, iron ingot, 64 gold ingot, 64 emerald, 64 lapis, 64 redstone dust, 64 obsidian, 64 coal.
And 7 purple carpets.
If you decide to take the chests. Please use the carpet to patch the holes please.
Have a safe and fun time searching for it.
May the hunt begin today, and end when found.