Directly south of Louisville, just off Interstate 65 and not far from Cave City, Mammoth Cave National Park sits nestled in the rolling, wooded hills of west-central Kentucky. Cedar trees dominate the landscape around the park, broken only by grazing cattle, small tobacco fields, and immense limestone outcroppings.Limestone is what makes this area special—a 600-foot thick slab of the stuff. Looking at the many road-cuts along the highway, one can see the layers, each possessing its own character.