Paris souterrain guide

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Are Paris's sewers open to visitors? The incredible underground city that runs beneath the capital

The sewers of Paris are more than just a drainage system. A genuine 19th-century technical marvel, they form an underground city, a portion of which can still be visited today.
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Can you tour the RATP maintenance workshops? The behind-the-scenes where the metro trains are reborn

Behind every metro car lies the meticulous work of hundreds of professionals. Step into RATP’s maintenance workshops and discover an industrial heritage as quiet as it is essential, seen only a few times a year.
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Is the secret bunker at Gare de l’Est open to visitors? A historic underground shelter preserved exactly as it was.

Built in 1939 to protect railway workers and keep rail traffic moving in the event of an attack, the bunker at Gare de l’Est is one of the best-preserved World War II remnants in Paris, and it is open to visitors... only on rare occasions!
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The Denfert-Rochereau bunker, Paris's secret Resistance site that you can visit for free.

Hidden beneath Denfert-Rochereau Square lies an old passive-defense shelter that became the headquarters of the Parisian Resistance in August 1944. An exceptional historic site, it had long been off-limits, but is now open to visitors.
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The forbidden catacombs: what is really hidden in Paris's largest underground labyrinth?

Forbidden catacombs fascinate as much as they worry. Between urban legends, clandestine explorations, and a genuine ossuary open to the public, it's sometimes hard to separate fact from fiction. So, which catacombs can one actually visit in Paris? And what does the vast underground network off-limits to the public conceal?
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Near Paris, unusual tours unveil a hidden maze of lesser-known historic cellars

Beneath the streets of Sèvres in the Hauts-de-Seine, an unexpected network of tunnels uncovers a forgotten heritage. The Caves of the King now provide guided tours that take visitors on a journey through history, catering to curious explorers eager to uncover unusual treasures in Île-de-France.
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The Catacombs of Paris, an unusual visit to the bowels of the capital

Have you ever ventured into the Catacombs of Paris? Let's go and discover this creepy brown place, known to all but where most have never been. A fascinating and historic site, a guided tour of the Catacombs is well worth the detour, as well as keeping you cool on hot days.
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La Maison du Fontainier: one of the last underground remains of the Aqueduc Médicis in Paris

In the heart of the 14th arrondissement, the Maison du Fontainier is home to the last glimpse of the Médicis aqueduct. Listed as a historic monument, this underground vestige opens its doors only on guided tours, to discover the history of water in the capital.
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Unusual: Visit the Lutetia thermal baths and their ancient underground galleries in Paris

Did you know? In Paris, you can immerse yourself in antiquity with a visit to the Roman baths in what was once northern Lutetia. Visit the Musée de Cluny to discover these ancient baths on one of its regular tours.
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Parvis de Notre-Dame de Paris: the former underground parking lot transformed into an indoor promenade

With Notre-Dame Cathedral due to reopen in December 2024, the area around the building is to be redeveloped, with work scheduled to start in autumn 2025. While the creation of a large square is on the agenda, the City of Paris also reveals that the underground parking lot, located beneath the forecourt, will be transformed into an "interior promenade". We tell you all about it.
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The Musée des Égouts de Paris (Paris Sewers Museum): discover the underbelly of the capital

The Musée des Égouts de Paris is one of the capital's most cult and unusual experiences, where you can wander six feet underground in a slightly damp atmosphere!
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Did you know? There are a dozen ghost stations in Paris. Do you know them?

While many Parisians take the metro every day, few are aware that the capital is home to a dozen ghost stations. Operated then finally abandoned or never opened... what are these ghost stations and where are they located in Paris? We tell you all about them.
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Did you know? The Opéra Garnier houses a hidden artificial lake

An artificial lake hidden in the underground passages of the Opéra Garnier in Paris? No, it's not an urban legend, but reality. So why is it there, and can you visit it? We tell you all about it.
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Ghost metro stations: discover why Gambetta station is unique in Paris

Served by lines 3 and 3bis of the Paris metro, Gambetta is located in the 20th arrondissement, west of Paris.
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The Paris archaeological crypt under Notre-Dame Cathedral

The archaeological crypt beneath the forecourt of Notre-Dame in Paris is a real step back in time. Here's what to expect when you visit.
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Did you know? There is a subway washing machine in the Paris underground.

Have you ever seen a metro go through the washing machine? Under our feet, between Nation and the maintenance workshops on line 2, our trains are regularly sprayed to keep them clean!
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Did you know? There is a ghost metro station under the Parc des Princes.

Paris-Saint-Germain fans wouldn't have minded a metro station just a stone's throw from the Parc des Princes. But for security reasons, Porte Molitor never opened and is now one of Paris's ghost stations!
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Did you know? This metro stop is the largest ghost station in Paris.

If you squint your eyes as you pass between Strasbourg-Saint-Denis and République stations, you might see the ghostly station of Saint-Martin, the largest of the 12 abandoned stops on the Paris metro!
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Did you know that? A monster is hiding in the underground of La Défense

While tens of thousands of people from the Paris region rush to La Défense every day to go to work, a monster has been lurking in the underground passages of the business district since 1973! We tell you the incredible story of the "Monster" by Raymond Moretti.
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Did you know? Châtelet-Les Halles is the world's largest underground station.

Who hasn't got lost in the Châtelet-Les Halles metro station? You've got a good excuse, because this underground station is the biggest in Europe, and even in the world - a real labyrinth!