During Cave Week, more than 200 students explore a simulated cave environment and participate in cave-related activities. Active cavers from a local club bring in equipment and photos and speak about their caving experiences. As student groups explore the simulated cave, other groups participate in different activities where they can create bat gliders or clean a limestone rock of graffiti. In this article, discover how to create your own in-class cave system--complete with cave art, dripping water, stalactites, and stalagmites--to teach students hydrology and geology concepts. (Contains 6 figures, 7 resources and 9 online resources.)