Ice formations

There is a creek not far from where I live and the water in the creek has been molded by winter into some interesting shapes. The first photo is of bulbous icicles beside a small waterfall (about a foot high). The second is of icicles which for some reason are wider at the bottom than the top. They look gigantic in the photo, but that's just because there is no sense of scale. They are actually about five or six inches tall.