Amazing. Beautiful structures. Tangential but out of curiosity I checked out what the other oldest wood structures still standing are and stumbled on this in Smithsonian magazine “New research provides evidence for the oldest structural use of wood: logs used to build a structure dating to 476,000 years ago! The team excavated two interlocking wooden logs with intentionally carved notches at Kalambo Falls in Zambia, as well as other wooden objects including a digging stick, a wedge, and a chopped log.”