I believe that quite a while ago, I mentioned in a blog entry about the botanical gardens being built at Penn State University. There's not a lot to see yet -- just dirt, construction equipment -- but there are some foundations being placed. They are visible in this shot from the webcam across Park Avenue.
According to the site http://www.arboretum.psu.edu/index.html, this is what is happening now:
• October, 2008 – Work will begin on stone and stucco for the garden walls, masonry and steel for the pavilion’s portico and two wings, and plumbing for the fountain.
• November, 2008 –The rose arbor, a major structure, will be built and the fountain will be completed. Work will commence on the irrigation system and on the roof of overlook facilities.
Here's an interesting feature about a historical "prairie" in Pennsylvania: