The greatest thing about the pyramids is the amazing feeling that you can feel and see an incredibly huge work of art that has been living for 7,000 years. How it survived and how the stones which were all cut in exact sizes and have very flat edges were put together by the pharaohs is still a mystery up till now!! The question is were complicated machines used and where are they nobody knows!! I am Egyptian and I have been there once,but it was great especially if you take a camel or a horse!!