Niagara Falls is actually both! It is a group of three waterfalls that straddle the international border between Ontario, Canada, and New York, USA. A supportive peer "geography" breakdown: the Horseshoe Falls (the largest and most iconic) is located mostly on the Canadian side, though the border technically runs through it. The American Falls and the smaller Bridal Veil Falls are located entirely within the United States. In 2026, the "best" views are generally considered to be from the Canadian side (Queen Victoria Park), as you are facing the falls directly. However, the American side (Niagara Falls State Park) offers a more "natural" hiking experience and the famous "Cave of the Winds" walk. You can easily cross between the two via the Rainbow Bridge, provided you have your passport or an "Enhanced ID" for 2026 border protocols.