My first encounter with a pink lake was 20 years ago. I was unaware that they even existed at the time. Imagine driving along and seeing one appear before you !!. I first thought it must a trick of the light . The lake can at times be so pink that it would be fair to suggest an hallucination . Fortunatly that is not the case, but chemicals, all natural I might add are here because of the bacteria and the right weather conditions. The 6 day Secrets of Esperance tour visits this remarkable lake as part of . I highly recommend visiting Lake Hillier as part of any journey around the South West of Western Australia. Check out these fantastic photos .