Your Daily Mind-Blow: The Lumarca
In this short documentary by Jason Scott, we see a beautiful work of sculpture/installation art made by Matt Parker, Albert Hwang and Elliot Woods. I won't spoil how it's done -- stick around through at least 1:50 for "the second blowing of [your] mind" when it's explained how exactly this is put together.
If you're in New York, you can experience the Lumarca for yourself at Eyebeam -- for two more days, anyway! You can also learn more and even build your own. Pro tip: try fullscreen mode, and watch this in HD.