I ran on the Ridge Hill map in 2012
, and I didn't find the terrain as interesting as Needham Town Forest. The map is dominated by a large marsh in the center that is completely inaccessible. IIRC, the useful part of the map would be about 0.25 sq km. There were some helpful comments
not dissimilar to this thread.
If you are interested in additional NEOC maps, I'd suggest checking the Trustees land. There are some interesting possibilities; I have notes on a few, though Noon Hill was the best patch of unmapped terrain from that inquiry. I've talked about some of the Trustees terrain with Ed, too.
Also note that World's End is a neat park but remote and has really boring terrain of wide open fields, broad hills, and a smattering of impenetrable vegetation.