I went to the Canadian side of Niagara Falls in October 2008, just after Maid of the Mist closed for the season. I visited the falls twice: in the freezing night and the next morning when it was, well, also freezing. The temperature above the Falls was very cold, but during Autumn visit, not yet cold enough to produce snowfall. As I stared at the Falls, I wondered if it could get cold enough for the Falls to freeze and ice over. In recent memory, the Falls have not turned to solid ice.
Or has it? A photo in Snopes claims that the Falls became frozen solid in 1911. I would like to know if Niagara Falls has, indeed, frozen over and if anybody has any photos of the Falls in this cold state.