This walking tour led by a remarkable guide,Marc, was one of the highlights of my stay in Niagara Falls! I cannot say enough good things about the tour. Truly.
HOWEVER, Viator needs to be much more clear that this is a fairly rigorous WALKING tour. I found this out the evening before the tour, and my elderly mother was not able to participate. Viator did not respond to my inquiries about a refund. I feel like my mother's ticket was wasted money.