One of the highlights of Quebec is the Montmorency Waterfall. It can either be reached by taxi for just under CAD 30 or by Metrobus line 800 for a flat rate of CAD 3,50 p.P. per trip. You get off at the terminus and you are immediately at the waterfall. Then you can walk over the bridge and down spectacular wooden stairs. If you can not go up the steep stairs, you have the possibility to use the cable car. As far as I know, this is quite expensive.
The Montmorency Fall (French Chute Montmorency) is a waterfall in the Canadian province of Quebec. It is located 13 kilometers northeast of the provincial capital Québec opposite the southwestern tip of the Île d'Orléans, on the border with the municipality Boischatel. The waterfall forms the mouth of the river Montmorency and crashes over a cliff 83 meters into the St. Lawrence River. This makes it the highest waterfall in the province of Quebec and about 30 meters higher than the Niagara Falls. The river basin at the foot of the waterfall is 17 meters deep. During the winter, the river below the waterfall is frozen, on the ice cover directly at the foot of the waterfall forms from the freezing spray the so-called pain de sucre (sugar loaf), an ice hummock, which can reach a height of 30 meters.
Source: Wikipedia