Sketching CARCASSONNE

I am super excited to visit Carcassonne in July when I visit southern France for the next Urban Sketchers' symposium in Toulouse. But for now I have to contend with a little virtual travel to this beautiful city. Just one hour train ride from Toulouse, this medieval city is famed for its ancient fortifications and towers. Let me know if you have any tips and recommendations when I am in Carcassonne.