Chuck Sutherland:
Jon Zetterberg, Mayapple Cave entrance, Grundy County, Tennessee 1
Chuck Sutherland:
Jon Zetterberg, Mayapple Cave entrance, Steve and Nancy Attaway Preserve, Grundy County, Tennessee 2
Chuck Sutherland:
Jon Zetterberg, Mayapple Cave twilight, Steve and Nancy Attaway Preserve, Grundy County, Tennessee
Chuck Sutherland:
Bob Biddix, Jon Zetterberg, Erica Sughrue