These pictures are nothing special, just an old point-and-shoot and phone - they look alright when cropped as they are here, just don't zoom in too far. :)
The first thing you notice when you enter the circuit is Eau Rouge, it is steep, and you cannot see the exit from the bottom:
Kemmel is flanked by a large hill on the left side that is filled with spectators during the race but much more open during practice sessions. At one end you'll be able to see cars crest Eau Rouge, at the other you'll get a great view of them entering Les Combes (a track map, for reference).
I didn't take any pictures of F1 cars on the straight but did attempt to catch some of the Porsche support series (panning is difficult).
Pouhon is another great spectator area (we spent most of our time during the F1 action here). It is a valley surrounding the corner complex and you get a great view of the cars after they exit Bruxelles through Pouhon and as they head off into Campus. Because it is situated in a valley you can shoot photos over, through and beside the fences:
I also took several shots through the fence on the exit of Pouhon and going into Campus:
It's possible to take shots along Blanchimont approaching the bus-stop chicane but this is difficult as you'll be in the trees on a steep hill with cars passing at >250 km/h. Prepare for hiking. I don't have many photos saved from this but here's one showing the pit complex:
That's about it for the tour of the track that we took. We went around several times over the weekend and photos were not always a priority.
There's some nice sights from the parking lot as well.
I will return sometime.