The sub-tropical jungle remnant is located an undulating high rainfall plain near Alstonville.
The Big Scrub comprised 75,000 hectares (190,000 acres) of lowland subtropical rainforest which was largely cleared for agriculture in the late 19th century.
There is wheelchair access, a wooden boardwalk, pit toilets, tables, gas barbecues and information boards.
Other notable species include White Bean, macadamia, yellow kamala and the rare Baloghia marmorata.
A tourist attraction in the early 20th century was a giant Moreton Bay fig, around 60 metres (200 ft) tall.