Conjuration spells. They look so beautiful and purple! The spells that resurrect dead bodies is probably the most amazing looking one. A bright ball of blueish fire.

I love the night sky. It's always beautiful. Always. The waterfalls are another thing I love. Even on the console version, I found myself just looking at the salmon swimming on top of the waterfalls and watching the water splash around. My favorite non-scenery visuals have to be seeing my character ready an arrow as he is aiming with his bow. I was getting tons of glitching out yesterday, and the one thing that bothered me the most was not seeing my character's hands.

The wildlife in the game is beautiful, as well. My favorite hold, Whiterun, is just amazing to look at. The plains and everything just feel so close to home for me. The place is filled with beautiful flora. Same goes for the Rift. I like all the visuals this game has, to be honest. It isn't too graphic intensive, but it also has so many great small touches. The only thing I hate about the graphics is how matted Khajiit fur looks.

I wish the fur was a bit less matted. I want the fur to look like it's flowing a bit.

Sunrise & Sunsets

But there are a lot of Visuals I love.
the Red Northern Lights are my favorite because it gives everything else a cool looking tint like the Torch's Fire
I Love any light reflecting off of the water, and especially making Ripples (I am addicted to making ripples)
I also like staring at my character, and always try to get a good view to where you can get a reflection of a light source on his/her eyes to give a nice gleam in his/her eyes
Long shot kill cams are one of my favorite kill cams, I love watching my Icy Spear, Arrow, or what ever it is fly through the air leading the camera to the victim

Are these mods or just for the PC? I don't remember seeing any of this on Xbox.

All of the water! I think it's all wonderful. And of course the night skies.