In Western Australia's Middle Island in the Recherche Archipelago, it'd be hard to miss Lake Hillier. No, it's not the largest lake-- in fact, it's only roughly 2,000 feet across.
Lake Hillier is famous for its color: bright, bubblegum pink.
This perfect pink little lake is salt-rimmed and surrounded by eucalyptus trees, white dunes and paperbark trees. Still, the exact reason for the lake's color remains a mystery.
In 1802, the first reported sighting came from British explorer, Mathew Flingers, the namesake of Flinder's Peak on Middle Island's highest point. According to his journal, Flinders had climbed his peak and was baffled by the technicolor waters.
Some scientists believe that the pink comes from some combination of specific algae and bacteria species mixing with the naturally low water nutrient levels. Another theory is that it's the reaction of the nahcolite (sodium bicarbonate) or red halophilic bacteria in the salt crusts.
And in case you're wondering, yes, it's safe to swim in Lake Hillier. (The map coordinates are: 34°5’41″S 123°12’10″E.)
Credit: Twisted Sifter