There are two funerary hypogea in Biniai Nou, which were built in the Chalcolithic period. These hypogea have their chamber excavated into the rock, whereas the access or corridor was built with vertical stone slabs, which form a megalithic façade.
These two tombs were excavated several years ago by an archaeological team sponsored by the Museum of Menorca. These tasks shed light into their chronology and let the team recover objects that formed part of the grave goods that accompanied the dead: ceramic vessels, awls, radiolarite fragments.
The tombs date from the Chalcolithic or Bronze Age.
Wikipedia https://en.wikipedia.org/wiki/Biniai_Nou_hypogea
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Coordinates 39°54'18.624" N 4°12'54.531" E