Here's a snap of typical morning activity, just south of the Rialto Bridge. If the Grand Canal has a "choke point", it's here. This spot is a favorite place for both water taxis and gondolas, vaporetto activity is fierce, and it's a bit of a blind turn beyond the bridge. Not surprisingly, some of the more dramatic accidents have happened here. Suffice to say, anyone who pilots a boat in these waters, had better be a good captain.