Another original contribution to the Houses in the Mail project, sent by Marina (the Netherlands)! The houses make think of trees, and there is a special feeling if you look at them when standing in their inner yard, the sender says. I can't resist to add this picture, taken from the Wikipedia:
The Cube houses (Kubuswoningen, in Dutch) of Rotterdam were designed by architect Piet Blom and based on the concept of "living as an urban roof": high density housing with sufficient space on the ground level. His design represents a village within a city, where each house represents a tree, and all the houses together, a forest. The central idea of the cube houses around the world is mainly optimizing the space, as a house, to a better distribution of the rooms inside. They are bigger that they seem: 100 square metres each (although not all of them usable, because of the walls that are under the angled ceilings).