From Project for Public Spaces, the listing (inlcuding many photos) for the best and worst parks in the world with links to most of them, very interesting.
Here is an excerpt.
The World's Best and Worst Parks
PPS names the parks--both superb and shameful--that stand out from the rest. Which places do you think should make the list?
At PPS, we love to stick our necks out. And we've done it again here with these lists of the best and worst parks, along with the best and worst squares. We know all of these parks and squares very well -- meaning we have studied them at various times of the year, we've worked on campaigns to improve them, or we have visited them at least five times. With both our lists of the greats and those most needing improvement, we hope to inspire discussion about how to make all parks and squares better.