My Dad took us there when I was in 6th grade or so. I still remember him demonstrating the optical interferometer to me which measured microscopic deformations of the surface. We also saw the extra blank for the 200 inch Palomar Observatory telescope mirror. One of many things he did to get me interested in science, technology, and engineering. Too bad you don’t enjoy such wonders—lots of us do.
Have an old National Geographic that did
a story of the making of that big glass mirror.
Great magazine before it turned leftist.