The _patio_, or open yard of Regla, on which the principal portion of the ores of the Real del Monte company are "benefited," or, as we should say, extracted, is situated deep down in a _barranca_, where both water-power and intense heat can be obtained to facilitate the process of separation. The immense amount of mason-work here expended in the erection of massive walls would make an imposing appearance if they had been built up in the open plain; but here they are so overshadowed by the mason-work of nature that they sink into insignificance in comparison. The bank, some two hundred feet high, of solid rock, as it approaches the waterfall on either side, has the appearance of being supported by natural buttresses of basaltic columns--columns closely joined together and placed erect by the hand of nature's master-builder. Still, all would have been stiff and formal had the sides of the _barranca_ been lined only with perpendicular columns; but broken and displaced pillars are piled in every conceivable position against the front, while a vine with brilliant leaves had run to every fissure and spread itself out to enjoy the sunshine. The little stream that had burst its way through the upright columns and over the broken fragments, fell into a perfect basin of basalt, heightening immensely the attractions of the spot. I sat down upon a fallen column, and for a long time continued to contemplate the unexpected scene, of which, at that time, I had read nothing. There was such a mingling of the rich vegetation of the hot country with the rocky ornaments of this pretty waterfall that I could never grow weary of admiring the combined grandeur and beauty of the place, from which Peter Terreros derived his title of Count of Regla.