The Lake Eyre Basin is a low lying drainage basin in inland Australia. Usually it holds a smattering of miserable brackish bodies of water - but every now and then rain from the wet season causes the basin to fill - creating Lake Eyre. This happened for the first time in 10 years in 2009, as usual an explosion of life followed.
One of the more surprising things is that flocks of pelicans fly there to breed - surprising because they come from the coast. How do they tell that rain has fallen and gathered so far away? Something to do with the Internet perhaps.