Spencer Tunick, Mardi Gras: The Base (Sydney Opera House), 2010.
Spener Tunick creates artworks in which nude bodies are infinitely repeated: “individuals en masse, without their clothing, grouped together, metamorphose into a new shape. The bodies extend into and upon the landscape like a substance. These grouped masses which do not underscore sexuality become abstractions that challenge or reconfigure one’s views of nudity and privacy.” +
I took part in one of his installations a few years ago. Great experience :-)