Xpujil's Río Bec towers, then & now...
Shown on the right is a Carnegie Expedition photo from 1938 (Ruppert 1943:Plate 39b).
"...much of the upper portion of the ornamental stairway remains intact. Non-functional stairways such as this apparently ascended both the east and west faces; they are so steep as to be utterly impossible to climb. The risers have a reverse batter in order to provide the desired indication of steps."