Within the folds of the Jordan Valley lies the Dead Sea, more than 400 m below sea level and the lowest point on earth. Rich in minerals that have seeped from adjacent wadis, the Dead Sea, as well as having exceptionally buoyant water, is believed by many to have curative powers. The nearby waters of Hammamat Ma'in, where a thermal spa has been built, are thought to be similarly imbued. The Dead Sea itself is flanked by mountains to the east and rolling hills of Jerusalem to the west, giving it an almost other - worldly beauty. Although sparsely populated and serenely quiet now, the area is believed to have been home to five Biblical cities: Sodom, Gomorrah, Adman, Zebouin and Zoar.