Lake Hillier may be the most famous of Australia’s pink lakes, but we find Hutt Lagoon in Western Australia equally striking—and miles more dynamic. This extremely salty body of water can transition from bubblegum pink to purple or red, depending on the season and time of day. If you drive along the salt flats between Port Gregory and Kalbarri just before sunset, you might even get to see the water change color right before your eyes.