The Chateau dominates the Haute-Ville or Upper Town. Basse-Ville or Lower Town is the area below the Chateau, just outside the city walls and in front of the Vieux-Port.
It’s lively and dense with just what you’d expect including the shoulder to shoulder crush of tourists. The tourist season here is pretty short making for even more urgency to get-it-all in the few months of good weather.