Ancient storage in the Grand Canyon © Jack Dykinga/Minden Pictures
Around 1100 CE—a good 400 years before Spanish conquistadors would first glimpse the Grand Canyon—Ancestral Puebloans tended terrace farms along the banks of the Colorado River. In order to store their crops during the rainy season, when floods might destroy food stores, and to keep animals from eating the harvest, they created the Nankoweap Granaries high up in the canyon walls.