Sidr trees also known as christs thorn, was an essential component used to complete many of the famous projects.today thousands of beekeepers gather in hadramout twice per year to venture up into rugged mountains to collect their prized sidr honey.their method of beekeeping is traditional one, employning no chemicals or machinery.A hand knife was used to collect the liquid gold,and smoke from burning dried camel skins used to keep bees away.