In “The Valley of the Moon” outside San Pedro de Atacama in northern Chile not far from the Bolivian border, we gawk like strangers in a strange land, which we are, and have been since we left Vermont a month ago, marveling at as inhospitable an earthbound landscape as we’ve ever seen, coming alive with color as the sun makes its way toward the horizon. It’s one more “We’ve never seen anything like this” moment in a month-long odyssey that’s covered so much geographical area we’ve literally spent days in the air, on boats, buses and vans just getting to the far-flung places that make this part of the world so rich in wonder but short on easy access.

As we hike up a long, sandy incline under a blistering sun, we round a curve and encounter everyone else doing the same thing in an Instagram bottleneck that impedes progress while mostly millennials, tongues lolling out and fingers twisted arthritically, record for posterity each step they take on the road to a kind of stardom, which I don’t fully comprehend. Research finds 40% of their generation without religious affiliation, terming them “nones,” so it appears their tech-enhanced search for meaning can comfortably begin and end with them.