A huge mysterious door-like structure in the Hayu Marca mountain region of Southern Peru near Lake Titicaca. It is part of an area known as a Valley of the Spirits, or Stone Forest, made of strange rock formations that resemble animals, beings, buildings, dinosaurs, and artificial structures. The door or the "Puerta de Hayu Marca" (Gate of the Gods) has been, at some time in the distant past, carved out of a natural rock face and in all, measures exactly 23' in height and width.