During a snow bank exploration, students noticed "ice caves," or pockets, in some of the larger snow banks, usually below darker layers. Most of these caves had many icicles hanging inside. Students offered reasonable explanations of ice cave formation--squirrels, kids, snow blowers--and a few students came close to the true ice cave-formation process, suggesting that the salt-rich layers of snow (the darker brown layers containing salt, clay, and sand) melted in the Sun and created the voids. The cave icicles formed as the less-salty melt water from the top of the snow bank seeped in and dripped from the cave ceiling, refreezing as icicles. As in previous geology-related explorations, class icicle observations led naturally to a discussion of how stalactites form, providing a perfect lead in to a hands-on activity that compared the two processes.