Almost 5,000 years ago, 200,000 laborers used 2.3 million limestone blocks to build The Great Pyramid of Giza, a tomb for Pharaoh Khufu (Cheops in Greek). The sheer size and scale of such an undertaking has to be seen to be believed. Near the ancient city of Memphis, The Great Pyramid is the oldest and largest at the Giza Necropolis, which contains two other pyramids and the famed half-lion and half-human Sphinx. It took almost 20 years to construct this marvel, and it was the tallest man-made structure in the world for almost 3,800 years. The Original Seven Wonders of the World
: The Pyramids of Egypt at Giza, Hanging Gardens of Babylon, Statue of Zeus at Olympia, Temple of Artemis at Ephesus, Mausoleum of Mausolus at Halicarnassus, Colossus of Rhodes, and Lighthouse of Alexandria.