Bernheim Forest & Arboretum in Kentucky was originally created from one man's desire to preserve the land that had given him opportunity and wealth. His vision has been expanded in size and daring, incorporating art that draws visitors from across the globe. Many conserved places face encroaching development and pollution. Bernheim is no exception, plus eminent domain threatens to put a wildlife corridor in jeopardy. Fireflies, also known as lightning bugs, spur imaginations around the world. A Bernheim naturalist tells of the wonders of wild night walks and why you should take them.