004 L'Île d'Arun vue de la grève du Seillour

The Île d'Arun is an islet in the

confluence In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); o ...

of the rivers

Aulne The Aulne ( br, Aon) is a long river of Brittany in north-western France, flowing down the hills and emptying into the roadstead of Brest, one of the many fjord-like bays just south of Brest. The river is part of the Canal de Nantes à Brest, th ...

and

Le Faou Le Faou () is a commune in the Finistère department of Brittany in north-western France. Population Inhabitants of Le Faou are called in French ''Faouistes''. Events The commune contains the village of Rumengol, location of a major religious ...

, at the base of the

roadstead of Brest The roadstead of Brest (''rade de Brest'') is a roadstead or bay located in the Finistère Departments of France, department in Brittany (administrative region), Brittany in northwestern France. The surface area is about 180 km² (70 sq ...

. It is located in the territory of the commune of Rosnoën in

Finistère Finistère (, ; br, Penn-ar-Bed ) is a department of France in the extreme west of Brittany. In 2019, it had a population of 915,090.

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

, and its highest point above sea level is 11m. Accessible by a land route, it was the stopping-off point for gunpowder headed from the powder-mills at Pont-de-Buis to the naval port at

Brest Brest may refer to: Places *Brest, Belarus **Brest Region **Brest Airport **Brest Fortress *Brest, Kyustendil Province, Bulgaria *Břest, Czech Republic *Brest, France **Arrondissement of Brest **Brest Bretagne Airport ** Château de Brest *Brest, ...

. It thus has the remains of a powder-magazine."Poudrière de l'île d'Arun"
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{{DEFAULTSORT:Ile D'Arun Fortifications of Brest, France Arun Landforms of Finistère