Explore the world's greatest mysteries.

The Nazca Desert holds hundreds of massive geoglyphs carved more than a thousand years ago, invisible from the ground yet unmistakable from the sky. Straight lines stretch for miles, intersecting with enormous figures of animals and shapes whose purpose remains unknown. Archaeologists have uncovered no written explanation from the Nazca people, and many of the designs don’t match any clear ritual, astronomical pattern, or practical use. Even in the culture’s final years, as drought and collapse took hold, they carved more lines—larger, rougher, and increasingly urgent. And whatever message they left in the sand still waits in the silence of the desert, unanswered.