Shot taken in Niagara Falls, Ont., Canada. The view is of a portion of the Horseshoe Falls. In the back ground is a view of the Niagara Falls, NY. State Park. The border is that close.
The Rainbow effect suddenly appeared a few minutes earlier and to an area not shown. The rainbow effect was created from the mist rising from the falls and the sun being at the exact spot to create the impression.
Interestingly, as you walked the promenade above the river, the rainbow seemed to follow.