What is this rainbow-like thing and how did I walk into it? : meteorology

On a walk along the Maine coast, I came across what looked like a seadog / colourless rainbow that was landing on a rocky outcropping.

As I walked towards it, it didn’t recede, just stayed in the same place. I figured it was an optical illusion until I walked into it. The light was ethereal and significantly brighter than outside of it.

I’ve looked and looked but have not found a suitable explanation for how that happened. Am I a god? Was I on hallucinagenics so strong even my camera captured it?

Link to images below (clear image of the “bow”, a close up as I approached on of the ends of the bow, and the light while I was inside of the bow).

https://imgur.com/a/jQVANWm