Cagliari Turismo, the tourist portal of the City of Cagliari
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Summer (from the 15th of June to the 15th of September): 10.00 am - 9.00 pm
Closed on Tuesday
The underground cavity inside the Public Gardens consists of a set of very large rooms, communicating with each other, which were built during the Middle Ages to extract blocks of building stone. During the Second World War , was used as air–raid shelter.
At the base of the steep rocky ridge that borders the Buoncammino hill, immediately behind the Municipal Art Gallery is the entrance to a great, ancient underground cavity that leads up to the Public Gardens . This quarry has been used for a variety of uses over time , in particular during the Second World War , was used as a air-raid refuge, creating protective walls and stone benches to accommodate the refugees. At the end of the war the quarry was still used as a dwelling by the people who had their homes destroyed by bombings , and later became a landfill where , after some time, there was every type of waste: from a hearse of the 19th century, to a plaster statue of the Pietà by the sculptor Ciusa of the 19th century. In early 2002, the cavity has been cleaned and prepared for his recovery for public use . Inside it still possible to observe , both on the walls and ceiling , the marks left by the tools of the miners of the time, and also the remains of the quarry from which building blocks were taken for construction and some inscriptions of the 19th century on the walls. In the immediate vicinity of the quarry during the refurbishment of the square , was also brought to light a well, whose characteristics resemble very closely those of the large wells in Castello district , which was the object of a study and detection by the Gruppo Speleo Archeologico Giovanni Spano . Dug into the rock , is 62 meters deep and has a square shape , with sides of 2.80 mx 2.40 mx 2.80 m at the entrance and 4.00 m at the bottom.