One of my favorite hikes as a teenager, visiting family in Spokane, WA, was the disappearing stream at Deep Creek, a tributary to the Spokane River. I loved hiking there in the summer, when the creek was low, and popped in and out of view. It was another of those places that sparked my interest in earth sciences. Of course, when I was a young and fairly ignorant high school student, I never knew about the pillow basalts, just the stream going to ground. It took my ex and a lovely winter hike years later to note the pillow basalts. It has wonderful pillow basalts about a quarter to half mile upstream of the confluence of the two water bodies. In another post (when I have a little more time), I'll share more about the local geology there (think lots of basalt). I got to share it with my mother and daughter (and a friend, via cell phone) this fall. There had been a small slide upstream, and the trail through the canyon was rather obliterated, but the 73-yr old and the 5-yr old did very well at negotiating the basalt boulder field that comprised most of the hike.
The five-year-old, looking at a larger example.
A nice shot of several pillows.The 73-yr old and 5-yr old, in between columns of basalt, looking downstream near the confluence.