Fifty kilometres south of Mandurah is this beautiful 12,000-hectare coastal park, consisting of 10 tranquil lakes and their surrounding woodlands and dunes. The park is recognised as a wetland of international significance for seasonally migrating water birds, with 130 species winging-in on the breeze.
Amateur scientists can ogle globular thrombolites at Lake Clifton, descendants of the earliest living organisms on earth (they are the only life form known to have existed over 650 million years ago). These rocklike structures are most easily seen when the water is low, particularly during March and April. There's a viewing platform on Mt John Rd off Old Coast Rd; keep an eye out for long-neck tortoises below the boardwalk. A 5km walking track starts from here and loops around the lake.