Landscape of Craters of the Moon National Monument & Preserve in Idaho(Photo courtesy of the author)

Looks like I wasn't finished with Idaho just yet. Our host in Sun Valley told us that, rather than get back on the main highway, we should take Route 26 to see the Craters of the Moon. These were different, apparently, from the craters of the actual moon, which we could see every night — albeit from a very great distance.

Thousands of years ago, a series of massive volcanic eruptions along the Great Rift — a 52-mile-long crack in the Earth's crust — produced a pristine, intact landscape of young basaltic flows in southern Idaho. I can't quite tell the ...

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