Niagara is like Blackpool. It even has a tower. And amusement arcades, and naff sweet shops, and drunken yoofs (like me) and a casino, and cheap hotels, and all sorts of that stuff.
It's still an amazing, awe-inspiring wonder of nature though. Go if you get the chance.
It isn't all just naff stuff by the way. And it's cleaner than Blackpool.