Several weeks back, a new member posted images of the tree house that he was building on his rural block. The thing that struck me was it's high visibility. Here is an idea....Now, I know that the image may be photo shopped, and there may be problems with deciduous trees....and accounting for snowfall.... however....it's an interesting concept. Via: Invisible Tree House Buzznet There are 24 other tree houses featured at the above site. Some are more like tree mansions than tree houses.