I was in India, I think, with a group of people doing some kind of research. We arrived at the building we would be staying and working in in the afternoon. After we got settled in & dinner was cooking, the sun started to set & I went east down a hill to a bluff overlooking a wooded valley & I saw rainbow looking things that looked kinda like Mewton's Rings but were more flower shaped kinda like a church window. They were kinda orangey, peachy against a grey-blue evening sky.
Maybe they were mandalas.
Newton's Rings explained