Three additional blue holes are accessible from several miles of trails that course through the cave valley. Conserved as an urban forest, the 23 acre site contains over 50 species of native trees and wild flowers, including several large Tulip Poplars, Kentucky's official state tree. The valley's walnut trees contributed walnuts to the Lost River Walnut Company, which operated here in the 1830s. Remnants of quarrying operations also include three magazines used for storage of explosives.