National Geographic : 1925 Jan
THE NATIONAL GEOGRAPHIC MAGAZINE STAIRWAY ASCENDING THE WESTERN FACE OE THE CASTILLO This stairway is 37 feet broad, including its two plain balustrades, and is exceedingly steep, rising at an angle of 45 degrees. There are 103 steps to the summit (see also page 68). Photographs from the Carnegie Institution THE SOUTH TEMPLE OF THE TLACITLI FIELD This building is 80 feet long and 16 feet wide and was little more than an open portico supported by six square columns. It stands at the southern end of the Tlachtli court, the long, high side walls of which make acoustic properties which are little short of amazing-an ancient whispering gallery.