Niagara Falls is a bit tricky because it spans both the US and Canada, so it depends on which side you're referring to:

* Niagara Falls, New York, USA: 43.0765° N, 79.0756° W

* Niagara Falls, Ontario, Canada: 43.0883° N, 79.0562° W

So, you can see the coordinates are very similar, but they differ slightly depending on which side of the border you're interested in.