There is an old stone wall running along the edge of a boggy area that might have been a cranberry bog many years ago. The wall has sunk over the years and now rises only a few inches above the level of the ground around it. After recent heavy rains and then a deep freeze, the wall was completely submerged in ice.
Much of the nearby ice was crystal clear, but each stone in the wall had a ghostly-looking layer of milky ice over it, which you see in the third photo. The second photo shows one of the very few that actually rose above the surface of the ice.
The scene was just as spooky and other-worldly as the photos.
Thanks for the comments.