I have visited this WHS for more than 30 times since I also work there. The highlight of this WHS is surely the tall Cathedral. Every year there is a sound and light show projected on the cathedral facade which is really worthwhile seeing. The Petit France is also a cute part of town. On a sunny day, I would suggest going for a stroll in the Orangerie Park especially in Spring when several White Storks can be seen nesting and roosting.