Well, I've never seen tree houses like these. By Takanori Aiba, these bonsai tree houses are to me the epitome of patience and imagination.
From Takanori's website:
"AIBA loved to play bonsai making and HO railway model since his
elementary age. He was not only making, but also playing with his
imaginary trip using his lilliput eyes. AIBA’s creativity comes from the
question ” If I were lylliput…” A small branch grows up a giant tree. A
rock becomes a huge rock island. These Bonsai series are origin of his
creativity. Bonsai was originally born in Heian era in Japan (794-1185)
and reflect the Japanese traditional aesthetic sense of expressing the
magnificence of natures in a small potted plant. However, the density of
decoration and the rich stories of AIBA’s Bonsai series contain
extraordinary times and spaces which differ from the bonsai world
determined by plants physiology."
via Colassal, via Flickr, via Takanori Aiba