The only granite quarry in Egypt is in Aswan. The closer to the Nile River, the easier it was to float the stones downstream (to Karnak/Luxor and Memphis/Cairo). This is the largest obelisk discovered, but it was never finished for unknown reasons. Had it been completed, the weight of this obelisk is estimated to be at 1200 tons (the next largest obelisk weighs 300 tons). In order to transport the obelisks, four boats were strapped together, and three obelisks were laid crosswise. The Egyptians then waited for the flooding waters to carry the boats away. Hatshepsut recorded that work on one of her obelisks took 7 months.
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Egypt Tours With Key of Life