Lakeland at night, looking out towards the water. The Greatwood, particularly around Fanow.

Also several dungeons or raids where I will just Return (coming back to the beginning) when done and chill somewhere to take screenshots or relax; the Qitana Ravel, for instance, just to hang out at the top of the waterfall. The Ivalice raids are all lovely, too; the bridge leading into Orbonne is one of my favorite spots.

Though right now my new favorite spot is Terncliff; I love that they will let us go back in when the instance is done; chilling near the fountain in the main square is just such a good place to chill.