The Pyramids of Giza the Most Famous Attraction in the Historical Cairo, the ancient Pyramids were Constructed from Limestone, granite roughly 2550 to 2490 B.C dates back to the old Kingdom Era of Egypt; till now the pyramids considered to be the tallest ancient manmade structure on Earth (146.7 meters high).

Tourists Come from all over the world to enjoy this sightseeing as it is a mystery of how were they capable of carrying stones such big (2.3 million stone blocks each weigh an average of 2.5 to 15 tons)  to construct such structure the engineers and archaeologists still couldn't solve this mystery even after the technological revolution.

The tallest Pyramid was built by the Pharaoh King Khufu which you can enter inside and see the structure and the main tomb room, the Pyramid of Khafre is in the background, and the Pyramid of Menkaure in the front.

Sphinx a statue of Legendary creature with a lion's body and a head of human, it is made of limestone, it was constructed in  2560 BC which dates back to the fourth dynasty, Sphinx was thought of as a guardians at the entrance of the great pyramids;
Many tourists have took awesome joyful pictures in the pyramids during their tour in the ancient history.