Introduction to the Pyramids: The Kiza Pyramid Group is located in the southern suburbs of Cairo and consists of three pyramids. The tallest and largest Pyramid of Khufu was built in the 27th century BC. It is now 138 meters high and 220 meters long on each side. It is composed of an average of 2.3 million pieces. It is made up of stacked boulders weighing more than 2.5 tons, with tight joints without any adhesive. It is known as one of the seven wonders of the ancient world.