Well im not to sure who took the pic but i think it was taken to captrue the queser/waterfall wut ever it is, and its purpose was to show the ppl wut some might think is a beautiful sighting.
Ansel Adams is the photographer who tool this picture, He was hired by the Sierra Club to create a book of photographs of American parks. The book was distributed to Congress, and successfully convinced its members to pass legislation that would preserve American parks by creating a number of national parks and preserves.
They made music out of nature and the sounds of tree wood banging on another stick of tree wood. Thats how they did music in the past now its digitally.