Final edit: Done!!
Here are the pics of the finished project.
This one is the final piece, done working on building, smoothing out the landscape (no one can tell what blocks it is underwater so I just made them all dirt) and started replacing all outside air with blue wool for a massive world edit //replace.
This is a entire set of structures I built myself over a few days. I was shooting for Atlantis, but figured that would be much bigger so I settled for less.
I plan on making this a bit bigger and improving the look some more before filling the entire outside with water and smoothing out the landscape. (It looks much cooler in actual water)
The reason I'm not building in water is... have you tried it before, its freaking dark! Being dark is one of the reason there are so many glowstones as you can see.
How I did it:
Each block was placed piece by piece in creative mode on my sever as I started just after 1.8 came out and my pluggins were down. After Im done I'll use world edit to somehow fill in the water of the outside up to the water level. After that work on the lighting. I'll post here after Im done.
Building Motto: In case of fire, do not break glass.