All astronauts are interested in observing unique human footprints from space, and especially those reflecting thousands of years of human activities. The region of the Great Pyramids of Giza—the last remaining wonder of the Seven Wonders of the Ancient World—is a favorite target. Although the pyramids have been imaged many times before by astronauts, each new image provides a unique look at the archeological monument, depending on the viewing angle from the ISS and the illumination from the sun. In this view, the shadows from afternoon sun provide directional arrows that point east. For scale, the current length of the large pyramid at the base is 227 meters (745 feet), and the height is 137 meters (449 feet).