Ciel is a revolving restaurant on top of Hôtel le Concorde. You can park in the hotel's basement. Be sure and take your ticket with you since Ciel will give you a discount card that you can use when you leave the garage.
We made our reservation for about 30 minutes before sunset and that was perfect. A complete rotation takes 90 minutes. There are 2 rows of tables, an inside row and an outside row. We got an outside table but the views are great from either.
After our experience on Île d'Orléans we were thrilled with the food and service at Ciel.