Guided tour in the Maginot Line fortress "Four-à-Chaux"

Guided tour in the Maginot Line fortress "Four-à-Chaux"

The Four-à-Chaux de Lembach is a major site of the Maginot Line in Alsace. Its guided tour will allow you to discover the period equipment of this imposing fortress with 5km of underground galleries and to understand its role during the Second World War.

  • A very complete guided tour that allows everyone to fully understand how the Maginot Line functioned during the Second World War.
  • The Four-à-Chaux is a mountain fortress and is therefore equipped with an impressive sloping plane (unique in Alsace) which connects the lower and upper galleries.
  • A visit to the Four-à-Chaux structure is ideal all year round: you will be sheltered in rainy weather (the entire visit takes place underground), warm in winter and cool in hot weather (the structure has a constant temperature of 13° C).

On the programme

The guided tour of the fortress is led by the volunteer guides of the "Association des amis de la Ligne Maginot de Lembach", who will guide you through the museum for about 1.5 hours and 30 minutes, taking you on a journey of about 1.5 km through the underground galleries and showing you the equipment and installations of the Four-à-Chaux.

Built between 1930 and 1935, the Four-à-Chaux fortress is one of the major sites of the Maginot Line in Alsace. Its location on a limestone hill south of the village of Lembach makes it a special place built on two levels of galleries. Visitors enter the upper gallery of the structure at ground level through the men's entrance, then gradually go down under the hill to end up 30m underground in the heart of the building, then reach the lower gallery using the sloping plane, unique in Alsace, by means of a staircase with 215 steps, before exiting through the ammunition entrance. Most of the original installations are still in place. The visitor will go from the barracks where the 580 men who occupied the structure during the mobilisation lived and where he can discover the kitchen, dormitories, hospital... to the officers' quarters and the central command post, then he will have the opportunity to visit one of the combat blocks where the guide will demonstrate the functioning of the artillery turret, before discovering the engine room, the multi-purpose room and an important museum...

This very complete visit allows everyone to imagine life in a Maginot Line fortress and to understand how this important line of defence functioned during the Second World War. (duration of the visit: 1h30 - temperature: 13°C)

Good to know

Included in the offer

Guided tour of about 1h30, on foot over a distance of about 1,5km

To take with you

A warm clothing (constant temperature of 13°C)

Important: You must present all tickets at the desk! Print out your tickets or download them before your visit, there is no network near the fortress.

Other info

Guided tour only available in French or German. Possibility to follow these visits with a GB translation. Visit in English is possible on demand for a group of more than 20 people, please contact us on +33 (0)3 88 94 48 62. 

Please arrive 10 minutes before the start of the visit.

Please report at the desk at your arrival.

Spoken languages German, English, French
Starting from 5
Maginot Line structure Maginot Line structure

Activity location


Ouvrage de la Ligne Maginot "le Four-à-Chaux"

4 D65, 67510 Lembach, France



Customer reviews


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Phenomenal tour

Commenté le 19/06/2024

Highly recommended, we had a little difficulty making online reservations but that was probably our own incompetence! We (anglophones) joined a French tour but were supplied with excellent folders on English giving pretty much everything of the guide's commentary. Our limited French allowed us to understand some of his humor. This was very well done. This is an excellent introduction to the difficult years after WW1 and France's plans to defend herself. We found the soldiers living arrangements incredibly interesting and the technology of the whole command and control system and the rapid fire cupola guns extraordinary. This visit was extremely good.


Excellent devoir de mémoire

Commenté le 19/06/2024

Pour l’histoire de France cette visite est riche pour mieux comprendre pourquoi la ligne Maginot est là !


Tolle Excursion… merci

Commenté le 17/06/2024

Sehr spannende Führung und perfekte Erklärungen

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