[Daily Photo] Rainbow over a waterfall in Yellowstone / 黃石公園瀑布上的彩虹

There are two major waterfalls on the Yellowstone River in Yellowstone National Park —  Upper Falls (109 feet) and Lower Falls (308 feet). Upper Falls is upstream of Lower Falls. I took this photo from the top of the Upper Falls, where a beautiful rainbow appeared on the waterfall.

此照片拍攝於美國黃石公園的「上瀑布」。由瀑布頂端向下俯瞰，可以看見一彎美麗的彩虹。