i figured tips would be more helpful thata specific spot, seeing as we are all spread throughout the country. idunno bout you, but im not driving to florida or something just to get a good picture.
if you want to know my picture spot, i like sunrise/sunset pics. the one w/ my wife sticking her head outta the sunroof is on K7, between Leavenworth and Atchison. its a little historical marker there and a lot. i should go take some more this year there.

 

Here's one of mine out in kansas