The ruins on the east side of the road comprise mainly three buildings, and an immense pile of stone in a pyramidical form, and in a much better state of preservation than those on the opposite side. These buildings are elevated upon a succession of terraces, which I ascended by a double flight of broken steps, to a square formed in front of each; the sides of which show the existence of walls now nearly levelled, and overgrown with trees and vegetation. Sufficient, however, is remaining of two buildings to indicate a similarity with those of the opposite side. The fronts measure about one hundred feet, the façades of which are ornamented with the most elaborate and skilful work, though now much broken and defaced. The carvings are somewhat similar to those of Chi-Chen; but they are much smaller, and do not display as much order in the arrangement. Broken columns, of unusual sizes, are to be seen a short distance from these buildings, evidently moved from their original positions. The door-step of the principal inner room is elaborately sculptured, and entirely different from any thing I have observed in other places. In the centre of one of these squares, foundation walls are to be seen, which have been recently excavated. They, probably, were pedestals. These structures stand, uniformly, about four rods apart, on a line; and all have mounds and a succession of broken walls contiguous to them. A few rods north of these buildings is a mass of broken stones, piled together in the shape of a pyramid, at the summit of which, to the height of one hundred and twenty-five feet, are still to be found the remains of the broken walls of an edifice. It is located, with reference to the cardinal points, like the pyramid of Chi-Chen, and was probably used for the same purposes, (whatever those might have been,) though the style of the work is not similar or equal to it. Its sides, at the base, measure five hundred feet, and are mostly bare; the loose stones barely maintain their form. The space occupied by these ruins cannot be less than a mile square. [Illustration: ZAYI RUINS.]