As nearly as I can tell, this is the rose window in the north arm of the transept, although we are in the south side. It makes sense, because otherwise you're standing too close to it to get this view. Also, you can read about how I figured out the difference here. Scroll down to the rose window when you follow the link.
This is taken from the aisle looking across the nave to the clerestory on the south side. It's simply beautiful, that's about all I can say.
Here's a view up the inner of the two side aisles. Notre Dame is so big, this isn't even the main nave. Not yet!
The sconces on the gigantic pillars intrigued me.
There are a number of different styles of capital used on the columns.
Here's a touch of the east end with it's gorgeous windows.
And this is the only picture I got showing the central nave.
Here's a closer-up shot of the altar area. There was always something going on when we stopped in. You want to be respectful and quiet, and at the same time try to see everything. Notre Dame was fairly central to where we were staying, so we enjoyed stopping by several times.