Building with Whole Trees
Treehouse 
Sixteen years ago Mr. Gundersen started building a simple A-frame house here for his first wife and their son, Ian, now 15.(via)
Tree room
“Curves are stronger than straight lines,” he explained. “A single arch supporting a roof can laterally brace the building in all directions.”
Desert 
treehouse
(Phoenix Desert Museum)
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(Phoenix Desert Museum)
Related link Farm House with Japanese Garden by Frank Lloyd Wright
Frank Lloyed Wright with his curious Chinese collection
Two Old Photos (Japanse Woodsman and street basket seller)