Travel Stories Celebrating Women in and Near the Parks Marilyn Martorano holding the music stones called Lithophones in Great Sand Dunes National Park Marilyn Martorano Share this Facebook Icon Twitter Icon Email Icon Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Photo: by Tori Peglar