The square tower (pl. 11, _a_), standing on a large angular rock in the
canyon below Hovenweep Castle, is a remarkable example of prehistoric
masonry so situated that it is shut in by cliffs, rendering the
outlook limited. Several published photographs of this tower give the
impression that it stands in the open and was an outlook, but that this
is hardly the case will be seen from a general view looking west up the
South Fork.