We'd never visited Niagara Falls before.
It always sounded touristy; years ago, driving from Maryland to Toronto, I skirted the falls, avoiding what I thought would be tacky tourist stuff (the edges of town at that time were downtrodden, to be sure).
But traveling this time, from Western North Carolina to Toronto and back, visits on both sides of the falls were powerful experiences. The falls are massive, of course, but standing next to some of the major "drops" (on the American side) are remarkable, both for power and sound.
I took a couple of videos (on my new iPhone), which recorded the sounds of the water, too.