These black-and-white shots are all from our trip to Mammoth Caves in Kentucky.
3.2s, f/4.5, ISO-400, 40mm
6s, f/5.6, ISO-400, 40mm
1/125s, f/4, ISO-12800, 53mm
B&W works well but the 3rd picture is a real puzzle.
These were scratches and markings on the cave wall. I didn’t quite catch what our guide said about them — I thought he said they were Native American markings, but I could be wrong about that.
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