Road Trips to Yosemite Neighboring Parks Devils Postpile National Monument “Devils-Postpile-Hexigons_Gloria_680” "Broken hexagonal columns at the foot of Devils Postpile. Photo by Gloria Wadzinski" Under construction Share this Facebook Icon Twitter Icon Email Icon Join Yosemite National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join Yosemite National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In