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240 been etched into the hard rocks to a depth of about 2 feet— and no one knows by whom and when or how, unless it was Adad himself who wanted to declare his presence. To the north of the bay, inland in the desert between the Ingenio and Nazca rivers, explorers have found one of the most puzzling riddles of antiquity, the so-called Nazca Lines. Called by some “the world’s largest artworks,” a vast area (some 200 square miles!) that extends eastward from the pampa (flat desert) to the rugged mountains was used by “someone” as a canvas to draw on it scores of images; the drawings are so huge that they make no sense at ground level—but when viewed from the air, clearly represent known and imaginary animals and birds (Fig. 109). The drawings were made by removing the topsoil to a depth of several THE END OF DAYS FIGURE 108