Flying rainbows

Spotted this home while walking/jogging this morning in Los Altos. I’ve always loved the Monterey architecture style with the second story porch. The flowers add a nice touch. 

Flew home today and got a nice look at the sewer system for San Jose area. Never noticed it before.

I spotted this circular rainbow flying along with us. I’m wondering what the explanation is for it and if it’s a common or rare occurrence. It didn’t last very long, as we soon descended through the clouds.