The Great Pyramid of Giza, constructed around 2560 BCE, continues to baffle modern engineers with its extraordinary precision. Standing at an original height of 481 feet, the pyramid's base forms an almost perfect square with sides aligned to the four cardinal directions with an accuracy of 0.05 degrees. The 2.3 million limestone blocks, some weighing up to 80 tons, were cut with such precision that the joints between them are often less than 1/50th of an inch wide. Without modern tools, ancient Egyptians achieved near-perfect symmetry, with the four sides of the base having an error margin of just 2.1 inches across a length of 756 feet. The internal chambers and passages demonstrate advanced knowledge of load-bearing structures, with granite beams and limestone blocks arranged to distribute the enormous weight and prevent collapse. After 4,500 years of earthquakes, erosion, and human activity, this monumental structure stands as testimony to the sophisticated engineering capabilities of ancient civilizations. Shutdown123