Now at 4000m and we've stopped at Lequepampa for lunch. Climbing to almost 4700m later today when we turn off the main highway

Pre-Internal ignition?  Roadside refuelling from the truck

There's a pre-Inca tower by the side of the road, which overlooks a river cut into the valley. It's a settlement, but there's little here but a few largish shacks. It's hard to imagine how anyone makes a living here.
:
well thumbed from my BlackBerry