Site · Europe and the Mediterranean · Malta
Ħaġar Qim
One stone at Ħaġar Qim is 6.4 m long and weighs close to 20 tonnes.
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Ħaġar Qim has a porthole doorway cut through one stone. Why go to that trouble?
Photo: Hamelin de Guettelet, CC BY-SA 3.0, Wikimedia Commons