Do you care about cairns? I do. Learn why in my upcoming newsletter about rocks. What are cairns, anyway? How did they come about, and why do they sometimes look like Sesame Street or Star Wars characters? And, I saw these characters with my guide in Peneda-Gerês National Park in Portugal this month.

Sharing more about this experience (plus some fall reading recommendations) in my latest Substack newsletter, out now: robynmetcalfe.substack.com/subscribe