I have, a couple of times-- I think there are pictures up on my Flickr. It's glorious. I like it partly because it's not TOO huge; you can tramp over a lot of it in a (fairly) reasonable amount of time. K has also taken some gorgeous photos there.

There's a non-famous one near me that has some neat things tucked in, including a lot of Gypsy graves, and a lovely Our Lady of Guadalupe section.