Waterfalls do not freeze completely in the winter; a shell or crust of ice usually forms over the surface and hides the water that continues to go over the fall. Undine Falls is mostly hidden under such ice all winter except for the bottom four to six feet. The night before I took this photograph, a cold front had gone through. The cold night air had formed a thin shell of new ice over the moving water at the base. I like the softness of the water contrasted with the delicate, lacy new ice and sturdy old ice.