A gorgeous green and magical mystery, Allison. Under water, I believe. Wood? Stone? Looking forward to the reveal.
Not wood, not underwater, not stone!
Whoa! Slightly stumped. No pun intended... though I *was* going to say Stump Underwater. But I see that's not the case. And not stone and not underwater. (Hence my "whoa!") Okay. How's this: Sidewalk Through Very Large Blown Bubble...?? (Love this, BTW. Whatever it is.)
Not wood, not under water, not stone ... Hmm. I have NO idea what this is, but the spiral design is captivating. And what's the reflection at left -- was it taken through glass? You really have stumped us, Allison!
At first I thought it was a cut from a tree but when I enlarged it I could see that it isn't. Is it a whirlpool in some kind of coloured liquid, or a reflection in a drop of water? Mysterious and beautiful!
My guess is an upturned glass bowl. Very beautiful. Will the Lady in Iceland please chime in and put us "out of our mystery???"