Somewhere in Coldharbour, there is a broken bridge across a glowing lake whose pieces move up as if the bridge is exploding, then settle back almost to their original places, then partly explode, over and over. It almost looks like it's breathing. And it was just an artistic effect, no gameplay significance whatsoever. Gorgeous.
This is a hard question, as it's all amazing, but I do like the semi-desert of southern Bangkorai and the savannas of Reaper's March. Auridon and Greenshade are also favourites.
If you guys want a screenshot overload, check out ESO Place Images at UESP.
There are so many times I just get stopped in my tracks to look in awe at the vistas and landscapes. So, I can't say there is one place that is the most beautiful, there are too many.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"