While these flowers on an African mountainside are in themselves roundish, the way they are growing also implies a circle, which I've emphasised by cropping off extraneous flowers from the right hand side.
The dust cloud by this lake is blowing around in such as way as to imply a circle.
More literally, the circular "feet" on this bench make it much more interesting than if they were more rectangular. I've made the image black and white both to emphasise the shapes but also to minimise the effect of the coloured graffiti.
The "doughnut" on Brighton seafront is an obvious choice for this project... and so had to be done!
