Totally far out! The first thing I thought of, upon seeing the thumbnail, was the magic of the Emerald City of Oz. The colors blend really well together and I like the canvas texture as well. Definitely takes your eyes on a fun journey!
I really like this and agree that it looks like a rollercoaster - either a rollercoaster in a darkened, enclosed space with a light show, or a rollercoaster at night somewhere not-terribly-lit-up (i.e. not a fairground) - a phantom rollercoaster which appears in the middle of nowhere and disappears just as easily? The tracks do seem worryingly broken... is the coaster haunting or haunted?
Anyway, it looks really good. I'm not sure about the texture here as I think it makes the image more tangible and I'm not sure that's what I see. But, then, it isn't what _I_ see that determines should determine that!
if i look at it i see a rolercoaster. nicely done!