Pyramids of Teotihuacan
according to Mr. Bancroft (“Native Races,” vol. iv., p. 533), that “the gallery is one hundred and fifty-seven feet long, increasing in height to over six feet and a half as it penetrates the pyramid; that the well is over six feet square, extending (apparently) down to the base and up to the summit; and that other cross-galleries are blocked up by débris.” In the Pyramid of Cheops there is a similar opening or passage-way forty-nine feet above the base; it is three feet eleven inches high, and three feet five and a half inches wide; it leads down a slope to a sepulchral chamber or well, and connects with other passage-ways leading up into the body of the pyramid.