The Hypogeum is an ancient underground burial site located in Malta. Dating back to around 4000 BC, it is one of the oldest known structures in the world. The site consists of a series of interconnected chambers carved into limestone, showcasing remarkable architectural skills of the prehistoric inhabitants. This UNESCO World Heritage site is notable for its intricate carvings and unique acoustic properties. The Hypogeum served as a burial place for the dead, with thousands of skeletal remains discovered within. It provides valuable insights into the rituals and beliefs of the ancient Maltese civilization.