Co-ordinates: Creating a square, Point one (-100z, -1600z), Point two (100z, -1450z)
Description of building: The large castle island I created with Denovin's assistance. This also includes the smaller jail island closely near by.
Description of underground area to be moved: There are numerous area below these islands, with lots of farms and various construction (as the almost working redstone elevator) going all the way down to bedrock.