It took several hundred years for the mass of tuff-rock (link to internal page of the site) that forms the "body" of the Great Waterfall to develop. In order to live in this place, humans tapped the Saint-Benoît natural spring-water source (link to internal page of the site) and directed the flow of water to a fixed point: the limestone was then deposited, thus accumulating the tuff-rock. And every year, it is necessary to check the encroachment of the tuff-rock on the road!