Led by the Israel Antiquities Authority, 500 volunteers have re-excavated the Cave of the Skulls – one of the largest caverns at Nahal Tze’elim. They found many items that shed light on daily life of Judeans sheltering following the Bat Kochba revolt against the Romans in the second century CE.
http://www.timesofisrael.com/in-bar-kochba-rebels-caves-salvaging-what-the-thieves-left-behind/