wigglebot: This one has apparently been completely swallowed by the tree. Those who come visit and find the tree are free to mark it as a find even after the archive, as it is still there, just completely unsignable.
I am marking it as archived so that a new one can be put nearby. Perhaps someone who found it in the past can put a ribbon on the tree so people can know if they found the old cache. And perhaps the new cache owners in that area can put a link to this archived cache.
I think it is really cool that there is a geocache inside of a tree....