The Sandhorst Mill went up in 1908, late in the era of working windmills on the East Frisian Geest. It is the standard regional pattern: tall brick tower, white cap, four sailed arms reaching out across a flat horizon that offers nothing else for the wind to catch. The mill survived the century that put most of its peers out of business. It is open to visitors today, kept running by a mill association that opens the gallery deck and demonstrates the gearing for tourists. The functional irony is hard to miss. A few kilometers away, in the same district, the manufacturer that has done more than any other to define the modern German wind industry uses the same prevailing winds to test rotor blades the length of soccer fields.

Enercon's main production facilities sit in the industrial area Sandhorst shares with its northern neighbor Tannenhausen. The company assembles wind turbines here: rotor blades, generators, towers, nacelles - the components that ship out to wind farms in Germany and beyond. The trucks were the problem. Each turbine requires multiple oversized loads, and for years they had to roll through the town of Aurich to reach the federal highways - Bundesautobahn 28 to the southeast, Bundesautobahn 31 running north-south on the west side of the peninsula - or the port of Emden for export. The traffic was untenable. In 2008 an old railway line was reactivated specifically to move the components by rail, lifting hundreds of truck trips a week off the local roads. Sandhorst is the only district of Aurich where the logistics of building wind turbines became dense enough to require a railway.

The other anchor of Sandhorst's economy is the Bluecher Kaserne - Bluecher Barracks - headquarters of the German Air Force's 4th Division. The base brought with it, in the 1960s, the kind of military neighborhood that German garrison towns know well: rows of houses, a church, schools, and a kindergarten built specifically for airmen and their families. The cluster sits north of the city center, integrated into the broader fabric of Sandhorst but distinguishable on a map by the regular spacing of the housing and the perimeter fencing of the operational areas. The base does not fly aircraft - that work happens at Wittmundhafen, the home of Tactical Air Wing 71 Richthofen, about 25 kilometers away - but the administrative weight of a divisional headquarters keeps a substantial population of military personnel and their dependents settled in Sandhorst year-round.

There is more to Sandhorst than industry and barracks. A large forest stretches across the district, equipped with playgrounds and a fitness trail, and used heavily by the residents of Aurich for weekend walks. To the east and northwest lie the bog areas that defined the East Frisian landscape before mechanized agriculture rewrote it. These particular bogs were cultivated decades ago, and they no longer show the raised-bog profile that the Ewiges Meer reserve still preserves a few kilometers north. But the topography is unmistakable from the air. The Geest soils rise just slightly, the cultivated fields are darker, and the residual peatland still drains in long parallel ditches that remember the moor underneath.