Move over, chameleons—this Senegalese lake has you beat! Throughout the year, this lake ranges from rose to orange to magenta—but the magic has a mind-boggling cause. A rare algae relies on the rosy pigment to receive and process the sun’s energy. So the gorgeous hue has a job to do! Though red algae and seaweed grow around the globe, the magenta blooms remain a rare phenomenon. So be sure to see nine more algal gems. Bon, voyage!