Horseshoe Bend

This composition is a great place to start for a potentially great photo. But as it is, there are a few things lacking.

You probably did not have a choice as to what time of day that you took this photo. But if you can ever go back, you ought to try early morning or early evening. Even the middle of the night would be nice, if you can get star trails in the background.

The colours are drab and the shadows are too harsh. Those issues would be solved with nicer light, found at the extremes of the day. The horizon feels crooked, even though the landscape itself is not flat, and I am guessing that if you tilted the camera a little bit clockwise, it would look better. Also, the rocks jutting out at the bottom of the frame are a little distracting, although I imagine that it would not be simple to change your perspective in this rough environment.

I agree with Karim concerning colors/textures/tones. A different time of the day will give you better results. I do see the horizon line issue, but it doesn't bother me, I rather see an amazing shot, then an aesthetically perfect one. Maybe play with it a bit in post and see what you can come up with, nice shot, i'm itching to go mysef! Cheers!