Software Used:

Vanilla Minecraft 1.7.2 (Creative Mode) MC-Edit v1.3.3.0

I've made the world save available in my Dropbox, here's the link: https://www.dropbox.com/s/81sss8av26efm6c/Biodome.zip?dl=0 It's fully navigable, you can run around and see it from all the different angles you want. You could even probably live in it, but you'd have to supply the furniture, and be careful not to fall into the empty void below... (Duhn duhn duhhhhn!) You could try MC-editing it into a survival world. If you add teleporters to get there and back it could be pretty neat.