Brilliant ideas, Joe, but kudos again to Laurie, your intial guess was correct, it's the Niagara Falls that Abraham Lincoln visited extensively in 1848. And I'm afraid he was incorrect as for "never froze" (last passage): http://quod.lib.umich.edu/l/lincoln/linc...w=fulltext
Joe, please don't blame me - you had a fair chance as my asking for "other opinions" offered the possibility to agree with Laurie!