The Baumgartner's Mill Bridge is a typical Lancaster County one, very pretty in a pretty setting, but with parking problems. It was restored in 1987. There may be a little of the ruins of the mill left among the underbrush, but not much. (Evans and Evans didn't see anything, but some of the leaves were off the trees when we were there, and we thought we saw a few stones in the brush).
Be sure to approach from the south, by Covered Bridge Road (what else?), unless you are driving your Road Ranger, since Creek Road to the northeast deteriorates to a very rough track.