NIAGARA FALLS 2022 - PART 2 - UNDER THE FALLS September 25, 2022 by Ryan Hougesen Journey Behind the Falls. Outdoor observation decks and two portals located directly behind the Falls. Up to 2,800 cubic metres of water thunders over the brink of the Horseshoe Falls every second, traveling 65 kilometres per hour. View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize