Have you ever visited a cave? There is something about caves, maybe they activate some caveman layers in our brain, like some long forgotten memory of ancestors.
was going to visit 3 but I was late for visiting the 2nd one due to my lunch & then drive there taking longer than I reckoned and I had to wait for the next one in an hour which meant in turn I was always going to be late for the last visit to the 3rd one