Clover Hollow Natural Area Preserve is a 25-acre protected area in Giles County, Virginia, created to protect Stay High Cave and its fragile underground ecosystem. Fed largely by water draining from the forested slopes above, the cave became a conservation priority after speleologist Dave Hubbard surveyed it in 1994 in response to local concerns. That work led the Virginia Natural Heritage Program and the Cave Conservancy of the Virginias to recognize its importance, and the state took control in 2005. The cave shelters seven rare invertebrate species, including three known only from Giles County's Sinking Creek Valley, along with salamanders, crickets, harvestmen, spiders, crayfish, and bats.