No, Niagara Falls is not located within the Canadian Shield. It is situated on the border between Ontario, Canada, and New York, United States, specifically at the edge of the Niagara Escarpment.
The Canadian Shield is a vast geological shield covered by an ancient rock formation that extends across eastern and central Canada and parts of the northern United States. While the Canadian Shield encompasses regions that are geologically interesting, Niagara Falls is primarily influenced by the Great Lakes and the Niagara River system.
In summary, while Niagara Falls is close to the Canadian Shield, it is not a part of it, as it lies at the interface of this rocky formation and the surrounding Great Lakes area.