Pyramids from around the World: Sorry, this doesn't "prove" any worldwide ancient culture or alien intervention. It simply means ancient people worldwide learned that the pyramid shape was the sturdiest form for creating BIG buildings
There are three known chambers inside the Great Pyramid of Giza. 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.