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7 stops, 3 km, about an hour and a quarter. Notre-Dame, Sainte-Chapelle, the Pont Neuf, the cafés of Saint-Germain and the Pont des Arts. One-time purchase, 4,99 €.
Open in the AddToMap app Don't have the app yet? See the tour Self-guided, works offline. First three stops free, then 4,99 € (both Paris tours 7,99 €). iPhone.