I always wanted a tree house, but my dad never built one. So my brother & I just played in the three trees in our backyard. We imagined they were so many different things. Way better then any tree house.
Sheung Wan Hotel - Hong Kong - by the Heatherwick Studio Built from scratch with an protruded exterior façade made of folded metal using the technology normally employed in making conditioning ducts and water tanks -
700 year old Iranian Home. Allegedly, these homes in Iran, carved out of solid rock, were built on the order of 700 years ago and are still inhabited by people who have given them modern touches (you know, the little things like and electricity)