Horseshoe Falls, Niagara Falls
The sunlit Niagara Falls.
Due to the heavy spray of water coming from the falls there is always a rainbow (or two) when the sun shines. Don't miss it if you're not (yet) sick of the Falls.
The Falls, Canadian side, are approximately 170 ft high and 2200 ft wide. The river at the base is actually deeper than the height of the Falls, at 184 feet.