Stephen Mehler - Waterways Beneath Giza Pyramids from youtube by TheHallOfRecords
related video : The Pyramids of Egypt and the Giza Plateau asd- Ancient Egyptian History for Kids - FreeSchool
related video : Great Pyramid of Giza Egypt - Textbooks Debunked - Ancient Egyptian Civilization & Lost Technology
Talking about the hidden underground passageways beneath the Giza pyramids. And the water transportation and utilization of the ancient Egyptians.