Today I drove (again) on the highway between East Wenatchee, and Quincy, WA in the deep gorge created by the Columbia River. The north side of this river valley displays an incredible continuous cliff of multiple layers of volcanic eruptions over the millennia. Right next to the highway. If you are interested in geology, (I am) this drive is spectacular. Central WA State is loaded with these kinds of geological marvels.
I’ve been through the “scablands” and Columbia Gorge a few times. It’s hard to get a mental picture of the Missoula floods until you see what’s left of the flood basalt that was in the way.