Others are rectangular, and still others circular.

About three miles off, toward the west, are found pictures pecked on large stones, one representing a bird, another one the sun.
An interesting relic of the population that once prospered in Casas Grandes Valley is a watch tower, plainly visible on a mountain to the southwest, and about five miles, in a straight line, from the ruins.

Well-defined tracks lead up to it from all directions, especially from the east and west.

On the western side three such trails were noticed, and several join at the lower part of the ridge, which runs southward and culminates in the promontory on which the watch tower stands 1,500 feet above the plains.
The western side of the ridge is in some places quite precipitous, but there is a fairly good track running along its entire extent to the top.

Sometimes the road is protected with stones, and in other places even with walls, on the outer side.