How cool is this? It's an orchestra conducted by the sun. Created by Massachussetts artist and musician Craig Colorusso, Sun Boxes is comprised of twenty solar-power speakers, each set to play one guitar note on loop, with the all the notes collectively making a B-flat chord. Says Colorusso:

"The piece creates space. It is an environment for one to enter and exit. the footprint this environment occupies is similar to that of a city: a metropolis. It is a burst of technology in the middle of nature. Unlike most cities...Sun Boxes interfaces with the environment and collaborates with nature. It is the perfect combination of technology and nature that create art, an environment, and a metropolis."

More sunny sounds at Colorusso's blog.