On the southern coast of Australia is a group of over 100 islands known as the Recherche Archipelago. On one of these, Middle Island, among the lush forests, is shiny lake. It looks like a giant footprint on the green carpet, surrounded by white sand.
It has 600 m in diameter and is relatively shallow. From the deep blue waters of the Indian Ocean is divided by only a narrow strip of scrub, sand dunes and white sand. Once the salt is mined from it, but abandoned it many years ago.
Recherche Archipelago and Lake Hillier were first examined by the expedition of Captain Flinders in 1802.
In 1950, researchers studied the lake, trying to find out what makes it extremely color. They expected to find in its salty waters of the algae. But they found no trace of them and no one can answer the question of where the lake takes its wonderful color.
The most likely explanation is considered that the pink color is caused by low levels of nutrients and by various bacteria and algae.