Argentina has 4,665 kilometres (2,899 mi) of coastline.The continental platform is unusually wide; this shallow area of the Atlantic Ocean is called Mar Argentino. The Argentine Atlantic coast has been a favorite among local vacationers for over a hundred years. The waters are rich in fisheries and suspected of holding important hydrocarbon energy resources. Argentina’s coastline varies between areas of sand dunes and cliffs. The two major ocean currents affecting the coast are the warm Brazil Current and the cold Falkland Current. Because of the unevenness of the coastal landmass, the two currents alternate in their influence on climate and do not allow temperatures to fall evenly with higher latitude. The southern coast of Tierra del Fuego forms the north shore of the Drake Passage.