Avon Valley National Park, Western Australia YouTube
The Avon Valley National park is perfect for day trips ($13 per vehicle) out of Perth or camping, with sites from $8 Per night per adult and $3 per night for kids 5-16, under-fives are free. Activities in the park include camping, bush walks, wildlife spotting, wildflowers, photography, astronomy, panoramic views and access to the Avon river.