The Hypogeum of Hal Saflieni
In 1902, construction workers while building the foundation for several houses accidentally discovered a mysterious underground sanctuary dating to 2500 B.C. Called the Hypogeum, the subterranean structure was revealed to be 3-levels deeps made from solid stones. Perhaps one of the greatest mysteries concerning the hypogeum involve the acoustical properties in what is called the oracle room. What happens is that if a person is within the oracle room the way their voice is carried is heard in the whole of the complex.
There are many theories regarding the oracle room and the leading one suggests that early Maltese people had mastered the science of sonic manipulation: the ability to manipulate solid matter through audio frequencies. If the oracle room was used to harness the power of audio waves as many ancient astronaut theorists believe, is it possible that the pre-historic builders used sonic technology to help build Malta’s mammoth temples? There is no concrete evidence to support this theory and why this hypogeum was built remains a mystery.