This caused a build-up of steam, gases and pressure which blasted the central core from the volcano.

This massive explosion left a huge crater, which filled with rainwater to create Lake Barrine.

[5] Facilities at the lake include picnic grounds, a kiosk and a pre-war tea house which was built in 1926.

The surrounding rainforest contains giant kauri (Agathis microstachya), red cedar (Toona ciliata) and flowering umbrella trees (Heptapleurum actinophyllum).

Wildlife common in the area include eastern water dragons, giant eels, saw-shelled turtles, scrub pythons (Morelia kinghorni), pied cormorants, black ducks, plumed whistling ducks, black coot, whistling kites, brahminy kites, black kites, white-breasted sea eagles and dusky moorhens.