Werakata National Park in the Lower Hunter Valley is loved by locals. It's also close to Sydney, which makes for the perfect day trip. There are great cycling and walking trails and in spring they're lined with purple, orange and yellow wildflowers, like acacias and banksias. There are rare plants here, found mostly in a special section of endangered habitat.
Bring some local Hunter Valley produce to the park and set up at pretty Astills picnic area. Then cycle along Deadmans mountain bike loop or Astills trail, which are both easy, flat and suitable for any fitness level.
Bring binoculars and a camera you'll find brightly coloured bush birds flying low enough for great photography. Birdwatchers who come to Werakata are never disappointed; the abundance of food in the park attracts the likes of the threatened swift parrot or regent honeyeater as well as several species of robin.