Base de Sous-Marins

In the port city of Lorient lies one of the most impressive monuments of 20th-century naval history — the Lorient Submarine Base. This giant complex, spanning 26 hectares, was built in France in the early 1940s. Its massive concrete bunkers, once capable of sheltering up to 30 submarines at a time, have today been transformed into a unique space for cultural, scientific, and technical tourism.

Lorient Submarine Base. Иллюстрация. Источник: Kupi.com AI

The modern name for the complex is Lorient La Base. The former military hangars and fortifications K1, K2, and K3 no longer hide warships; they now house innovative shipyards, museums, and sailing centers. The site is considered a true engineering marvel due to its ability to withstand the most powerful aerial strikes and its sheer scale, which continues to capture the imagination decades later.

For tourists, this is more than just a historical site; it is an entire interactive village. Here, you can not only touch the cold concrete of the bunkers but also see the actual submarine La Flore, visit the world's oldest submarine rescue simulator, and admire modern ocean-going yachts. Its 4.5 rating confirms that it is one of the most iconic attractions in the Brittany region.

To plan your visit and check for the latest information on special events, you can use the official communication channels. Below are the primary contact details to help you prepare for your trip.

The highlight of your visit will be the La Flore Submarine Museum. You can step aboard an actual submarine that served in the French fleet for a long time and see firsthand the conditions in which submariners lived and worked. A visit to the massive K3 block is also a must — a guided walk through its echoing halls allows you to fully grasp the colossal scale of this concrete fortress.

Fans of technology and active recreation will enjoy the Cité de la Voile Éric Tabarly — a modern museum dedicated to sailing and maritime regattas. It features numerous interactive exhibits that will interest both adults and children. Additionally, the base features a unique site: a 15-meter simulator tower built in 1942 for submarine evacuation training.

Beyond the historical tours, the base is a magnet for yachting enthusiasts. You can simply stroll along the waterfront, watching high-speed catamarans being prepared for world races, or visit one of the shipyards. The atmosphere of Lorient La Base combines the ruggedness of military architecture with the lightness of a modern resort port, making a walk here truly memorable.

The site is located in the southern part of the city in the Keroman district, right on the banks of the Blavet River. If you are traveling by car, the most convenient route is via the N165 highway. Ample parking areas for visitors are available within the "Lorient La Base" territory.

For those preferring public transport, bus lines 1 and 2 run regularly from Lorient city center. You should get off at the "La Base" stop; the journey takes about 15–20 minutes. You can also take a taxi from the central square or use a rental bike, as there are convenient cycling paths leading to the base.

If you are arriving from another region, the nearest train station is Lorient-Ville, served by high-speed TGV trains (the journey from Paris takes about 3 hours). The base is approximately 5 km from the station, easily reached by bus or taxi. During the warmer season, pleasure boats and ferries also run along the Brittany coast.

The construction of this colossal site began in 1940 under the direction of the Organisation Todt. Approximately 15,000 workers were involved in the project, allowing for the rapid creation of three massive blocks: K1, K2, and K3. The K1 bunker was the first to enter service in September 1941, and the total area of the complex reached an impressive 26 hectares.

During the 1940s, the base served as a key hub for submarine maintenance and repairs, with over 200 submarines passing through its docks. The thickness of the reinforced concrete ceilings reached up to 7 meters in some places, making the structures virtually invulnerable to aerial bombardment at the time. Remarkably, even after active hostilities ended, the base remained almost undamaged.

From 1945 to 1997, the complex was used by the French Navy. In 1946, it was officially named in honor of engineer Jacques Stosskopf, a hero of the French Resistance. During this period, the base was used for testing and maintaining modern submarines, including nuclear ones, and it housed unique training centers for submariners.

In 1997, the site's military history came to an end, and its civilian transformation began. Today, the formerly secret zone has become an open maritime tourism center, where historical heritage harmoniously exists alongside modern sailing shipyards and museums, preserving the memory of the region's naval glory.

To fully explore all key sites, including guided tours inside the bunkers and a visit to the submarine museum, we recommend setting aside at least 3–4 hours. This is enough time to thoughtfully study the exhibits and walk around the port area.

If you also plan to visit the Cité de la Voile Éric Tabarly interactive center and have lunch at one of the local cafes overlooking the yacht marina, it is better to budget half a day (about 5 hours). The base territory is quite large, so factor in walking time between the different blocks of the complex.

The attraction is open to visitors daily, making it easy to include in any travel itinerary. The operating schedule remains stable throughout the week:

• Monday — Sunday: 10:00 – 18:00

Please note that the start times for the last tours of the museums and the submarine may be limited, so it is best to arrive no later than 16:30. Depending on the season or special sailing events, the opening hours of individual pavilions may vary slightly.

Exploring the surroundings of "Lorient La Base" will allow you to dive deeper into the city's maritime atmosphere and see equally interesting monuments of engineering and history. Most nearby sites are within walking distance or a short drive away.