The b&w theme for 'flash of red' this week is circles. Unfortunately, I have to really stretch to make any claim of circles in this scene, but it is b&w! So the answer to the question in the title is, 'there aren't any.'
Taken while hiking in Sabino Canyon -- a beautiful area in north Tucson, Arizona
never mind the lack of circles (although I see a suggestion of a circle shaped window looking down the river ), the scene is so delightful - the tree and the rocks behind come together to provide a burst of energy into the image
I'm so glad that there aren't too many, but I did see something like a circle on the rocks in the bottom right corner. Interesting shoreline - full of rock and brush and water.