Europe

Many ancient megalithic structures exist in Malta and one of them is the ‘Hypogeum of Hal Saflieni’, a subterranean structure with magnificent properties that is more than 5,000 years old. The Hypogeum (a Greek word meaning ‘underground’) is supposed to be the oldest prehistoric underground temple in the world. The discovery of this incredible site was made in 1902 when construction workers, who were excavating to build the foundations of a building, stumbled upon what appeared to be an underground sanctuary. When archaeologists began uncovering the site, they found a massive underground structure consisting of three levels carved into stone. It has been estimated that more than 2,000 tonnes of stone would have needed to be removed for its construction