[Suggestion] Server wide project?

Besides exploring and tidying up my Nexus in the city (on Herobrine and Orangered) I have found a general lack of things to do.

As seen in other servers, I think we should have some sort of server-wide project (an enormous pyramid or giant manmade cave) that anyone in the server could contribute to in their spare time. This would go a long way in preventing griefing (caused by boredom) and beautifying the server (in its awesomeness).

Questions/comments/theories/suggestion?