One place that was definitely on our radar that we wanted to check out was Niagara Falls. From Nashville we plotted our course to get there and it took us through Kentucky. We did just an overnight stay at a little park in Renfro Valley. It was actually a cute park that hosts a bunch of country music concerts.
We did drive the road that runs parallel to the river and falls on the Canadian side. It definitely looked like you would get better views of all the falls from that side! Now we know!