One of the oldest in the Seven Wonders of the World, the Pyramid of Giza is the largest of the three pyramids. Believed to have been built as a tomb, it was the tallest man-made structure in the world for over 3,800 years. The pyramid is covered in limestone and granite with a whooping 146.7 metres standing tall. The pyramid houses the kings and queen’s chambers, grand galleries, voids and tombs.