niagra falls is really awesome. i went once and stayed in the "Sheraton on the falls" for vacation. There's a boat that you can take called the "Maid of the Mist" that goes down near the falls and you wear these ponchos they give u. There's also some casino's near the Niagara Falls as well, but my parents don't gamble and i was too young, but for some reason casino money is valued there, like you can use the tokens at other places or something if i remember correctly. You can also walk right next to the falls (of course there's a wall) but u can get surprisingly close to where its just pouring over, and it almost makes you feel like you want to jump in lol (so brace yourself). There is also a whirlpool that you can check out which is located a couple miles down from the falls (they say years and years ago that the falls were right next to the whirlpool, but with years of eroding the falls have moved back). There's a cable car that goes right over it. There is also a super powered jet boat as well that will take you in and around the whirlpool area (i think it may have costed $50 or something) but it seemed worth it, even though i didn't get to do it. We also went to an IMAX theater there that had a show on the falls, which was pretty cool as well (it was my first IMAX experience).
of course all these activities took place in the summer, so adjust accordingly. some might not be open i dont know how it rolls there in the winter time.
all in all it was an awesome trip
hope u have a good trip