Switchbacks on the dirt road down to the Iruya valley (Argentina)
Iruya is a beautiful but very remote village in Northern Argentina. The dirt road that reaches the village is about 50Km long. It fords several rivers and goes over a 4000 meter pass. Iruya is reachable daily by local bus from Humahuaca (unless rain makes the road impassable).
This road can be done with a regular car at the dry season only, since there is several rivers to ford. As soon as it rains in the region, the rivers will become impassable unless you have 4x4 (4WD).