Lake Eyre (pronounced "air") is the lowest point in Australia, at about below sea level. When it fills with water, it is the largest lake in Australia, being long and wide. It is also in the driest part of Australia, getting only about of rain each year. It is in the north of South Australia, about north of Adelaide. The lake was named after the explorer, Edward Eyre, who was the first Europen to see it in 1840. It is the centre of the Lake Eyre National Park.