Pyramid of Giza (Egypt) – 5,000 years old
The Great Pyramid of Giza (also called the Khufu’s Pyramid, Pyramid of Khufu, and Pyramid of Cheops) is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now Cairo, Egypt, and is the only one of the Seven Wonders of the Ancient World that survives substantially intact. Originally the Great Pyramid was covered by casing stones that formed a smooth outer surface, and what is seen today is the underlying core structure. Some of the casing stones that once covered the structure can still be seen around the base.
There have been varying scientific and alternative theories regarding the Great Pyramid’s construction techniques. The base originally measured about 230.33m square. The original height was 146.59m. The Pyramid lies in the center of gravity of the continents. It also lies in the exact center of all the land area of the world, dividing the earth’s land mass into approximately equal quarters.