
Giza is the third largest city in Egypt. It is located on the west bank of the Nile River, some 20 km southwest of central Cairo. Along with Shubra El-Kheima, Cairo and Helwan, the four cities form the Province of Greater Cairo metropolis.
The Great Pyramid of Giza (also known as the Pyramid of Khufu or the Pyramid of Cheops) is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now El Giza, Egypt.
It is the oldest of the Seven Wonders of the Ancient World, and the only one to remain largely intact. Egyptologists believe that the pyramid was built as a tomb for fourth dynasty Egyptian Pharaoh Khufu (Cheops in Greek) over a 10 to 20-year period concluding around 2560 BC.
There are three known chambers inside the Great Pyramid. The lowest chamber is cut into the bedrock upon which the pyramid was built and was unfinished. The so-called Queen's Chamber and King's Chamber are higher up within the pyramid structure. 
The Great Pyramid of Giza is the only pyramid in Egypt known to contain both ascending and descending passages.
The main part of the Giza complex is a setting of buildings that included two mortuary temples in honor of Khufu (one close to the pyramid and one near the Nile), three smaller pyramids for Khufu's wives, an even smaller "satellite" pyramid, a raised causeway connecting the two temples, and small mastaba tombs surrounding the pyramid for nobles.
photography was not allowed inside the pyramids 
Khufu's vizier, Hemon, or Hemiunu, is believed by some to be the architect of the Great Pyramid. It is thought that, at construction, the Great Pyramid was originally 280 Egyptian cubits tall, 146.5 metres but with erosion and absence of its pyramidion, its present height is 138.8 metres . Each base side was 440 cubits, 230.4 metres long.
The Giza Necropolis is an archaeological site on the Giza Plateau, on the outskirts of Cairo, Egypt. This complex of ancient monuments includes the three pyramid complexes known as the Great Pyramids, the massive sculpture known as the Great Sphinx, several cemeteries, a workers' village and an industrial complex.
smaller Pyramid of Khafre (or Chephren) a few hundred meters to the south-west

modest-sized Pyramid of Menkaure (or Mykerinos) a few hundred meters further south-west.