The 1,520-acre Green River Preserve (GRP) stretches across both banks of the Green River in Hart County, Kentucky, and helps protect a high concentration of endangered species, including mussels, cave shrimp, and bats. The habitats of the Preserve include bottomlands, uplands, barrens, caves, limestone glades, and of course, the river itself. The Green River and its tributaries are centers of biological diversity for freshwater mussels and fish, hosting over 150 fish species and 71 mussel species.