Studies on child psychology have shown that the conception of thefoetus and the new-born baby occurs topographically and, only later,this primitive form of perception is transformed by learning. Undergroundarchitecture also has a sacred, mystic halo, since it pays tributeto Mother Earth. A cave is a finished dwelling from the very beginning,complete at any point of the excavation process, even beforethe digging begins, since the ground holds and contains the potentialspace. Therefore, while digging a subterranean dwelling, thespace shakes itself out of the rock in the same way as Michelangelo’sstatues of slaves do. Nevertheless, in this case there is no limitof growth, since it expands according to its need, becoming a totallyfunctional dwelling (Noguera et al., 2007).