The school I used to work at and now volunteer at has historically been a pretty dirty, bare looking place. At one point we got some trees planted, which made a big difference (although they are a little scrawny). My friend Robin painted some murals which were beautiful and also helped.
I walked into the cafeteria last week and it was totally transformed. The kids had made it into an art museum and the whole feeling of it was changed.
Two years ago: Update and Help Needed
Four years ago: Open House