I was total­ly unpre­pared to be climb­ing well on the tufa-filled caves of Guadal­cázar. I had either been avoid­ing or unable to join the group on the pre­vi­ous trips for the 3‑hour dri­ve up north into San Luis Poto­sí, but I’m very glad that I did join them this time. It is a beau­ti­ful place, well-off the high­way....