picture taken on May 19, 2013, shows el-Wad cave on the western slopes of the Mount Carmel range near Israeli northern city of Haifa. Sites of human evolution at Mount Carmel, including the caves of Tabun, Jamal, el-Wad and Skhul, were recognized as World Heritage Site by United Nations Educational, Scientific and Cultural Organization in 2012. [Xinhua/Yin Dongxun]