I've been reading up on the subject of big parks vs. little parks and have learned something interesting. Apparently, large 3x3 parks, small 1x1 parks, fountains, playgrounds, ponds, etc. all have the same impact in regards to land value and aura. I don't know if this is true or not, but it is worth trying out. If one could get the same effect from a small park as a large park, it doesn't make sense to waste land on large parks.