Ancient CivilizationsHidden tomb discovered by scientists investigating vast city beneath Giza pyramid Posted on April 3, 2025 by Administrator A ‘sarcophagus’ hidden more than 600 feet below the surface in Egypt is the latest discovery from the team that uncovered a ‘vast city’ beneath the Giza pyramids. Italian researchers told DailyMail.com that they identified an unknown chamber under the Tomb of Osiris, which is believed to be a symbolic burial site dedicated to the Egyptian god of the afterlife.