I built this monster using this texture pack (voxel box deep space), so it's extremely recommended.
Without this texture pack it would be very ugly.
Here's the texture pack: http://www.planetminecraft.com/texture_pack/the-voxel-box-deep-space-pack/
It's a massive super star destroyer class executor from Star Wars.
I spended more time making the inside than the outside of this huge beast, we are talking about 3/4 milions of blocks approximately
There're a lot of bombardament systems (TNT and Lava), cannons and a lot of other stuff, it's extremely funny to use this thing with a crew (I used this with 32 people and we weren't enough to manage the entire ship with over 80 mods).
Feel free to mod all of this as you prefer but if you want to use this world somewhere please write my name.
Ps: In this world there're a lot of other stuff around the Star Destroyer, because McEdit can't extract a schematics so huge and I want to apologize for this.