زمزم
By the middle of the 6th century, there were three major settlements in northern Arabia, all along the south-western coast that borders the Red Sea, in a habitable region between the sea and the Hejaz mountains to the east. Although the area around Mecca was completely barren, it was the wealthiest of the three settlements with abundant water from the renowned Zamzam Well and a position at the crossroads of major caravan routes.