So...that was Windsor Great Park. Didn't see that much of it - just the waterfall and the temple, but I liked what I did see. Bumped into sea_cucumber and Giles whilst wandering around the waterfall which was a bit of surprise. We ended up chatting about buying some land somewhere and building our own little village. Which would be cool. Having looked on the net for land, I dunno how likely it is we'll be able to do it though. Still, it's a nice idea.
Shall definitely have to visit again - when it's not so wet. Once past Holloway, the journey isn't so bad.