Nice framing of this image to create a virtual forrest within the ripples of sand.

This is great. As with a couple of other submissions, it could almost be a satellitle image. Terrific detail and patterns. I wonder how it would look with a bit more contrast?

I'm guessing this is a photo of frost on a windshield...but whatever it is the abstract nature of the image is effective. I especially like that in my mind's eye I see trees in front of mountains.

My knee was hurting so I got up to check out the latest additions to the remarkable responses to Ana's theme (3:30 a.m. here). Now I'm stuck on this fascinating image. I can't help but wonder what it is. It appears to be some kind of creeping vine on a concrete wall, but that's as far as I get.
An excellent contribution.