Have you considered a helicopter tour of Niagara Falls? The helicopter tours appear to rate at least 4 stars (or more) by even the most jaded tourists.
Niagara Helicopters Ltd. | Spectacular Niagara Falls Sightseeing Tours
FYI Flight Restrictions Niagara Falls:
http://www.ecfr.gov/cgi-bin/text-idx...3.11.4&idno=14
Scroll down to Flying The Falls CYR 518:
http://www.tc.gc.ca/eng/civilaviatio...tions-5827.htm