Well, I decided to take and recreate the Citadel from Half Life 2 into Blockland. After quite a bit of time and working with making the shape and such I finally got the citadel exterior and some interior done.
I was going to make the core but I really didn't feel like messing with it as of now because of the fact that my PC has been crashing more than usual. I made it.
Credit:
Alyx Vance - 29548 (not me)
Peavy22 - 2167 (me)
Lesrock - ?????
Armquist - ????
Anyway, on to the images.
Old pic but it includes the roof:

Outside


Core



Core control room

Control room with alarm set off

Breens Office

Train tunnel


I have a lot more done and fixed up but I don't have them at the moment.