NatureFind: how to find public parks, campsites, and gardens by zip code

As a follow-up to my prior post (heirloom gardener: Green Hour: how to find public parks, campsites, and gardens by zip code), the creators of Green Hour sent me the link to their updated website, NatureFind, with even more features, including integration with Google Maps:

http://www.nwf.org/naturefind