Share this postUnderground geometryterryjallen.substack.comCopy linkFacebookEmailNoteOtherUnderground geometryTerry J. AllenOct 18, 202311Share this postUnderground geometryterryjallen.substack.comCopy linkFacebookEmailNoteOther2ShareSpelunk the Opposable archivePreviousNext
Spelunked: always interesting, some fascinating, even without people when the geometry becomes even compelling. Good eyes!!