What comes at the end

There’s nothing physically at the end of a rainbow. Rainbows are optical illusions caused by sunlight refracting through raindrops, and they don’t have a fixed end point like a road or a rope. The “end” you see is determined by your position relative to the sunlight and raindrops. While myths often place a pot of gold at the end, this is a metaphorical concept, not a literal one.