I fuckin' love this image.
This image was taken (just last week) in a single color of the red visible spectrum called H-Alpha. It was then inverted and falsely colored. The texture that makes up the majority of the surface is called spicules while the light wisps seen on both the edges of the sun and along it's surface are prominences. Those darker tangles are sunspots, one of the largest groups of sunspots yet recorded is right of center.
I just love seeing that the bright spot in the sky, that you're never supposed to stare at, in such kick-ass detail. A full resolution of the image can be found HERE.