Found it! Thank you. That area of the country is fascinating. Maybe it’s because I grew up in the Great Lakes area and seldom get to see wide-ranging desolation. I’ve driven to CA and back once; took I-40 there in 1986 and I-80 back in 1987. Have never been down the stretch we are talking about.
The drive along Interstate 15 south of Las Vegas is a fascinating trip through the basin and range country of the Mojave Desert, past ancient lava flows and lakes that dried up millennia ago, such as Ivanpah, where the solar power facility is located, and Soda Lake.
On the other hand, being from California, I find it fascinating to see a Great Lake up close, as I did when I visited Michigan City, Ind., Port Clinton, Ohio, Erie, Pa., and Chicago.