The train scene from Buster Keaton’s “The General” is the most expensive scene in silent film history
By 25 BC, ancient Romans developed a recipe for concrete specifically used for underwater work which is essentially the same formula used today.
Angkor Wat used far greater amounts of stone than all the Egyptian pyramids combined, and occupied an area greater than Paris.
The Great Pyramid of Giza was once covered in highly polished white limestone, before it was removed to build mosques and fortresses