Why go
The city’s landmarks make more sense as connected places than as a checklist. The Château Comtal sits within the fortified Cité, while Saint-Gimer lies below it. Pont Vieux crosses the Aude toward Bastide Saint-Louis; Place Carnot anchors that lower grid, and the canal marks another edge of the visit.
The full story
The Château Comtal occupies a separate part of the Cité rather than the whole fortified town. Below the walls, Saint-Gimer offers another church associated with Viollet-le-Duc’s nineteenth-century work. Pont Vieux gives a crossing between the upper and lower city, with the Aude making the height difference visible. In Bastide Saint-Louis, straight streets lead toward Place Carnot and its Neptune fountain, a very different plan from the lanes inside the Cité. Continue toward the Canal du Midi if you want to see why waterways and transport belong in Carcassonne’s story too. These stops can be sampled in pairs; there is no need to turn every landmark into one continuous circuit. At Pont Marengo, the road crosses the canal beside the port basin. It is a brief engineering stop, distinct from Pont Vieux and its river view toward the Cité.