About twenty-four miles east of the city of Mexico, in a plain, called by the aborigines, _Micocatl_, or _the Path of the Dead_, are two Pyramids, one 180, the other 144 feet in height, the former being 676 feet on each side, at the base. They are constructed of clay mixed with small stones, which was encrusted on the outside with a thick coating of porous amygdaloid. They presented four stories or platforms, each considerably narrower than the one next below; and on the top were originally two colossal statues of stone, covered with plates of gold, designed to represent the sun and moon. They are surrounded by several borders of smaller pyramids, about thirty feet in height, forming streets, which run exactly in the direction of the four cardinal points. Eastward from these, as we descend the Cordilleras, towards the gulf of Mexico, is the Pyramid of Papantla. It had seven stories, and was higher in proportion to its width than any other in the country, being 59 feet in elevation, and 82 feet on each side at the base. It was built entirely of hewn stones, of extraordinary size, regularly shaped and neatly fitted together. It had three staircases, each leading to the summit; and the stairs were ornamented with hieroglyphics, and small niches symmetrically arranged. South-eastward from the ancient city of Quanhuahuac, on the western declivity of the Cordillera of Anahuac, rises an isolated mass of rock, 358 feet in height, shaped by human labor into a regular conic form. It has five stories or terraces, the sides of which incline inward as they ascend, each being covered above with masonry; the uppermost of these is 236 feet from north to south, and 315 from east to west; and is encircled by a wall of hewn stone six feet and a half in height. The base of the hill is also surrounded by a deep and very wide ditch, whose outer circumference measures nearly two miles and a half. In the centre of the upper natural platform was a Pyramid of five stories, of which only one now remains. It faces exactly the four cardinal points, and is on one side 67, and on the other 57 feet in extent. The stones of which it is composed are regular in shape, fitted neatly together, and are covered with hieroglyphics, each figure occupying several stones; among them we discovered heads of crocodiles spouting water, and men sitting cross legged, as is the custom in Eastern nations.