Underwater Dungeon!

Minecraft Seed: :P

If you go to this place:

x=122
y=44
z=136

then you have found yourself an underwater spider spawner! In the chest there is:

1x Cocoa Beans
1x Saddle (you can ride a pig :D)
2x String
1x Bucket
2x Iron Ingots
5x Gunpowder (enough for TNT!!!)

NOTE: You have to dig a couple of fallen blocks of sand to access the chest.