I went to a concert in Buffalo last Friday and then we stayed in Niagara Falls, ON for two nights. It was really cold and windy (and then it started snowing!) so we didn't see too much of the falls, but it was still nice.
ETA: That last one is supposed to be a video. I don't know why you can't play it here. If you want to see it, just click it and it will take you to the flickr page where you can view it.