62.
Obsidian treasury that is compact width and length wise, and tall enough (In the ground, or up into the air) to hold your goods safely behind obsidian and an iron door. Creeper proof!
and if your using 1.3,you can put 1 ender chest in that room for your most precious goods
Pork chop farm
temple dedicated to Llamas (i did this :3)
exp grinder
bomb shelter
escape pod
spa
sushi bar
creeper statue
art gallery
armour forge
weapon forge
barracks
turret tower
wolf training facility
roller coaster
giant toaster
weapon storage
food storage
I'm not sure if this would be on there or not, but a special Portal room that looks like the Netherrack and Soulsand is coming out of it like tentacles, tearing into the walls and such. A very fun thing to do
Create a parkour race
Ice Fortress
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(God, that was back when I didn't have an account. ;___; )
Or Creeper guard Cats.
Creepers are afraid of Cats.
...with a hidden piston door activated by a button or switch to possibly prevent an untimely demise.
and if your using 1.3,you can put 1 ender chest in that room for your most precious goods
A workshop (filled with crafting tables tools).
temple dedicated to Llamas (i did this :3)
exp grinder
bomb shelter
escape pod
spa
sushi bar
creeper statue
art gallery
armour forge
weapon forge
barracks
turret tower
wolf training facility
roller coaster
giant toaster
weapon storage
food storage
I'm not sure if this would be on there or not, but a special Portal room that looks like the Netherrack and Soulsand is coming out of it like tentacles, tearing into the walls and such. A very fun thing to do
well really cats would work better because creepers are scared of cats true fact.