 The waterfalls in the park are at their best after rains and the main ones are accessible by car.The formation of the area began with muddy sediments under ancient oceans that were changed by heat and pressure into hard rocks, then uplifted by movements of the continental plate and volcanic eruptions.This resulted in the formation of the Great Dividing Range, an undulating plateau that sloped gently to the west and fell away steeply to the east.