No list of mysterious buildings can begin without mentioning the Great Pyramid of Giza. Built over 4,500 years ago, it remains one of the most precise architectural feats in human history.
How the ancient Egyptians moved massive limestone blocks—some weighing over 70 tons—remains a topic of debate. Equally puzzling is the pyramid’s perfect alignment with the cardinal points and the fact that it originally shimmered with polished white casing stones. Was it a tomb, a celestial observatory, or something more?