Author's Note: Please look at all the screenshots before rating :)
We built this Dark Tower with 5 People on our Private Multiplayer server. It has 3 Floors and a giant underground mine. While converting this thing the outside got pretty much f**ked up.
Floor 1: Gold and Diamond Blocks
Floor 2: Iron Blocks with chests
Floor 3: Lapis Lazuli with a lot of bookshelves.
Top: Obsidian with the dime/day maching for Runecraft(Multiplayer mod).