Strange rainbows meeting in a fork at the horizon are reflection bows. Sunlight reflected upwards from water produces them.

A lake, a marsh, a very calm sea or even a wet parking lot is enough.   Water sunwards of the eye is best.

In effect there are two suns - one in the sky and another an equal distance below the horizon shining upwards. Each sun produces its own rainbows.

Who will be the first to capture reflection fogbows?