The idea includes incorporating nature into construction. And the designers created such a principle in construction as the principle of "save space". The essence of the principle of conservation of space is the maximum possible preservation of space for nature on a specific building site in a specific location. There are several methods for this: Flying architecture. It consists in reducing the built-up area and raising the building above the ground, then the surface under the building remains free for plants. Thus, the building is supported by an installation that lifts it up. Tree houses. These houses were originally conceived as a children's play space in the trees, then just for outdoor recreation. Today there are already a million of them. The principle is to build a residential house on a tree, which does not require any supports, since the tree is the support. Horizontal skyscraper. The idea of overcoming the force of gravity. The principle gives rise not only to buildings that grow upwards, but also expand in length. The idea was born from the representation of prehistoric dolmens, which represented the image of stone slabs flying in a circle.