Apparently at 155m below sea level, Lac Assal is the lowest point in Africa and the third lowest point in the world and Djibouti is home to the bizarre dystopian landscape of Lac Abbé, a plateau dotted with hundreds of limestone chimneys, some standing 50m high and belching puffs of steam. All we know is that Lac Assal, a crater lake, is 10 times saltier than the sea...