Danish architecture firm Konrad Wójcik is the author of an architectural project, called Primeval Symbiosis, which re-thinks the sustainable and eco-friendly houses, outside the city, in the heart of the forest. Inspired by the tree-house concept, these suspended homes, thought to host two people, are topped by solar panels which generate energy and a heat pump located in the ground. The goal was to make a structure that has no negative impact on the environment.