Озеро ейр має одну з найбільших внутрішніх систем водозбору в світі

Kati Thanda–Lake Eyre Basin is one of the world's largest internally draining river systems – its streams do not reach the sea. It spans 1.2 million km2, which is almost one-sixth of Australia.
So much so that the salt crust (at around 300mm thick max) often doesn't completely dissolve before the Lake dries again. Swimming in this water, assuming you are prepared to walk through the mud far enough to get to deep enough water, can be extremely painful.

National Geographic