Elemental BIO-Spheres

This is project I've been constructing recently, i intend to add more pathways etc to it before i end the build.

The main idea of this is that there are four BIO-Spheres each with a different element: water/life, ice, fire and earth/desert. The spheres are made of glass and lined up to about half way with a mixture of dirt, stone, snow, Netherack, water, gravel or lava depending on the specific BIO-Sphere. The spheres are floating above an ocean i found which was pretty big, so perfect for the desolate, isolated feel. :)
I Hope you like them.
They're my first project.
Please leave feedback! :)

(The video i uploaded was filmed by Gaftie, and there will be more updates as the build progresses.)

The download file this was on has been lost, been looking for it recently but no luck. I have been designing a new bio-sphere on single player to upload soon! :) - Found the file, thought i'd quickly finish it, so heres some more screenshots! ^^