Blue lakes are common but have you seen a pink lake?

Picture driving on a road, with a blue lake on one side and pink on the other. That’s Lake MacDonnell, a lake that straddles the border between Western Australia and the Northern Territory. Nestled amidst the rugged beauty of South Australia's Eyre Peninsula, Lake MacDonnell’s deep shade of pink is caused by a particular type of algae – Dunaliella salina.