Awhile ago, we put up this fantastic "quad" skybox platform. It's very medieval and fantasy. 4 large platforms, each surrounded by mountains, and everything connected by bridges to a central point.
I was standing on this bridge and noting how beautiful it looked, especially in that light, so I snapped a picture. Click on it to see full size.
The particle effect in the center is of my design. It's called Duelling Comets, and this set is specially made to emit colors of red, black, and purple.