Starting at Notre Dame and ending at the Eiffel Tower sounds like a classic Paris day. In between, we set a challenge: cross the city using only public transit and discover what makes a system feel truly effortless.

The result is a rapid tour through metros, trams, the RER, buses, bike share, and even the Montmartre funicular—from Châtelet’s maze to La Défense and Saint-Lazare—highlighting lessons on frequency, fares, automation, and street design. With a look at Line 14 and the sweeping Grand Paris Express expansion, this episode captures why Paris remains one of the world’s most navigable transit cities.

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