The Great Pyramid of Giza is one of the most famous monuments in the world, located in Egypt. Built around 2580–2560 BC during the reign of Pharaoh Khufu, it is the largest of the three pyramids on the Giza plateau. Originally standing at 146.6 meters (481 feet), it was the tallest man-made structure for over 3,800 years. The pyramid was constructed using approximately 2.3 million blocks of stone, showcasing the advanced engineering skills of the ancient Egyptians. The Great Pyramid served as a tomb for Khufu and was part of a larger complex that included temples and smaller pyramids for queens. It is the only surviving structure of the original Seven Wonders of the Ancient World. The pyramid's precise alignment with the cardinal points and its complex internal chambers continue to intrigue historians and archaeologists today.