Thirlmere Lakes National Park Highlights: Part of the Greater Blue Mountains World Heritage Area, this park's five reed-fringed freshwater lakes, abundant with waterbirds and surrounded by quiet patches of forest, are among the last undisturbed lake systems near Sydney and have enormous scientific value. Activities: Only low-impact activities, such as walking, swimming, canoeing and picnicking, are encouraged. Camping is not permitted anywhere in the park and powerboats are prohibited on the lakes. Access: 95 km south-west of Sydney, 35 km south-west of Camden off Remembrance Drive (unpaved). Open only during daylight hours.