This video explores the "Serapeum of Saqqara," a subterranean tunnel and temple complex in Egypt, which is believed to be a burial site for the sacred Apis bulls. The presenter discusses the history of the site, how it was built, and the challenges faced by the builders, who had to carve out the hard granite bedrock and work in a dusty and dark environment.

The presenter questions the accuracy of Egyptologists' dating of the site and suggests that the boxes could be much older than believed. He also highlights the precision of the interior angles of the boxes, which were cut from a very hard stone, and suggests that the design and construction indicate a level of knowledge and technology that was far beyond what is commonly believed for that time period.

The video also explores the origin of the word "Serapeum" and its connection to the Apis bulls. The presenter concludes by discussing the mystery of the unopened box and the dynamiting of it by Auguste Mariette when he found the site in 1851.