Niagara Falls, NY, USA?!
I used to work so close I could hear the falls from my office. (At night, anyway, when everything else was quiet.) Let me know if I can offer any advice!
There's not much to see on the U.S. side except for that giant waterfall; however, that's what you need to see anyway.
Totally nothing like it. Try the Maid of the Mist and Cave of the Winds if you really want to get the full impact. It's surrounded by the oldest state park in the nation.
Edited to add: Oy, I didn't realize that this was an older thread.
Hope you had a blast!