It is easy to see why the location scouts stopped here. Uspallata sits in a high desert basin where the Andes pile up on every side, bare and immense, the light hard and clear. The valley offered something the Himalayas could not: the mountains looked the part, and the town had roads, beds, and the infrastructure a major production needs. Brad Pitt and a small army of filmmakers moved in, recreated Tibetan streets and monasteries, and shot the long caravan sequences across the surrounding heights. Then they left, and the town went quiet again, as if the whole thing had been a strange and vivid dream. The valley returned to what it had always been: a waypoint on the road between two countries.

Just over a kilometer from town stand the Bóvedas, a cluster of curious dome-shaped kilns that look like enormous adobe eggs half-buried in the earth. They date to the early seventeenth century, built to smelt the gold, silver, copper, and zinc dug from nearby mines. Look closely at the brickwork and history surfaces in an unexpected place: some of the refractory bricks are stamped "Rufford Stourbridge," the mark of a firm from the English West Midlands, a small fingerprint of Britain's industrial reach pressed into the Andean dirt. A little museum beside the kilns explains how they worked, and how, in time, these same furnaces would be turned to a far weightier purpose.

Uspallata's valley earned a place in the founding story of two nations. In January 1817, General José de San Martín launched his Army of the Andes from Mendoza on one of history's great military gambles: a crossing of the cordillera to liberate Chile from Spanish rule. He split his force, and the column that funneled through the Uspallata Pass was led by Juan Gregorio de Las Heras. The kilns nearby had a role too, repurposed to help arm the independence cause. Picture the scene: thousands of soldiers, mules, and cannon threading up into the high passes in summer, gambling that they could cross 4,000-meter ground before the weather turned. Within weeks, they had descended into Chile and changed the map of South America.

Leaving Uspallata westward, the highway climbs into the most dramatic country in the region. The peaks here form the foreground to Aconcagua, the highest mountain outside Asia at nearly 7,000 meters, and the road grants sudden, breathtaking glimpses of it between the ridges. Farther on, the route passes the ochre-stained natural arch of Puente del Inca, built by mineral springs over millennia. The valley itself is austere. With barely 156 millimeters of rain a year, Uspallata holds a cold desert climate of pleasant days, cold nights, and the real possibility of winter snow. It is a place that rewards the passing traveler with scale and silence, then watches them continue on toward the border.