We just build on it. A vast majority of it is just two people and there's about twice as much stuff underground that you can't see this picture does a bad job showing the scale of the place.
It was mostly a way to procrastinate when I was in school but it was also a way to relive stress. I don't play much anymore although I still love my world. Sometimes I go into it and just look around for memories. It's crazy, I remember every stressful thing that was happening when I built certain structures. Almost to the block in some areas.
If you look at this much older render of the server you can see a large forest fire near the top of the image. Back when forest fires were like devastating fire storms. Anyway, on this huge server you can still see, near the left of the image, where that same fire destroyed all of the trees and left the wood blocks