Here's Niagara Falls, as seen at Legoland Discovery Centre in Vaughan Mills. (Note that most of the buildings in Miniland are landmarks from Toronto.)
Last summer I visited Niagara Falls at night with young friends. I though Legoland did a great job at recreating the ambiance. When night falls over the city, there's even a small projection of some firework display in the background!
See more landmarks at Legoland: