The first one I ever went to was in upper Michigan - St. Ignace to be exact (although St. Ignus works on map quest too) and it was built or discovered if you prefer, before the big bridge was built connecting the upper and lower parts of that state. If you were coming south, well you were there to be had by countless signs painted on barns and billboards for miles around.
Obviously gravity is a pretty constant thing but these mystery spots "defied" gravity. Actually they were built on hillsides and all the angles were skewed around so that level looked uphill or downhill, the beams and slats that the eye/brain normally processes as vertical/horizontal were at funny angles and, simply, your sense of up and down was completely fooled by the optical illusion.
We just spent three long days with a very dear friend and her family as her husband and their father died very suddenly and for no reason anyone can fathom. If ever God made someone who should have stayed among us as an example it was Frank and there seemed little justification if any for the event. We watched and listened as her world, so orderly, so left and right, up and down, became a mystery spot where nothing seemed true and plumb.
With the St. Ignace "mystery spot", if you had just a modicum of science you "got it" and could figure it all out. Your mind was no longer fooled and things were seen for what they were and are.
With this death, well I don't know. I have a pretty good dose of faith in me as did his wife and family. Within that reference we are all pretty baffled by what we saw. It is going to take a heap of explaining and learning for me to figure this one out.