jennifersofia just told me about a nursery which is being set up in Scotland with a heavy focus on outdoor play / discovery. There's an article on it in the Guardian here and another article with a few more details here .
I think this sounds amazing. I have an interest in 'playscapes' (the creative evolution of ordinary 'playgrounds') and it's great to learn about the application of this sort of idea to a nursery setting. (A couple of sites on this sort of thing if you're interested: Planet Earth Playscapes and Natural Playgrounds .