If you like nature’s quirks, you’ll love the Pink Lake in Senegal on the west coast of Africa. Known to the locals as Le Lac Rose or Lake Retba, this warm and shallow stretch of water gets its distinctive colouring from a high mineral concentration and the vast number of micro-organisms that inhabit it. The high salt content means that like the Dead Sea, everything floats- but the main reason anyone clambers in is to get at the thick layer of salt on the lake floor to sell on at the local markets. The lake, situated 30km to the north-east of the Senegalese capital of Dakar, is also the last stage of the world-famous Paris-Dakar Rally. But it is its almost psychedelic colouring that really makes it worth a visit. It is one of those natural phenomena that needs to be seen to be believed. But after you and your friends have set eyes on it, nothing will ever quite seem the same again.