Springbrook National Park preserves 6,197 hectares of subtropical rainforest along the eastern rim of an ancient shield volcano that erupted 23 million years ago. The plateau rises sharply from the coastal plain, its basalt cliffs holding the longest falls in Southeast Queensland and one of the continent's most accessible Gondwana relict ecosystems. Designated a UNESCO World Heritage site within the Gondwana Rainforests of Australia in 1986, the park protects species that survived the breakup of the southern supercontinent — Antarctic beech, piccabeen palm, and strangler figs that root in the canopy and descend over decades to the forest floor. The Natural Bridge itself is a collapsed lava tube, now a moss-lined cavern where a waterfall plunges through the basalt roof into a shallow pool lit by bioluminescent glow worm larvae. These are Arachnocampa flava, endemic to eastern Australia, whose sticky silk threads trap midges and moths drawn to the cold blue-green light the larvae produce through a luciferin-luciferase reaction. The chamber was known to Kombumerri people as a ceremonial site long before European survey parties mapped the hinterland in the 1840s. Today it anchors the park's southern precinct, linked by walking tracks to Twin Falls, Purling Brook Falls, and the canyon overlooks of the eastern escarpment. Springbrook waterfalls & natural bridge tour from gold coast options depart year-round, with morning itineraries favored for cooler temperatures and reliable light in the forest understory. Purling Brook Falls drops 106 meters over a single basalt step, its plunge pool accessible via a four-kilometer circuit that descends through warm temperate rainforest, crosses the creek on stepping stones, and climbs back through stands of brush box and flooded gum. The track passes beneath the falls, where mist coats the rockface in liverworts and filmy ferns, their fronds a single cell thick. Twin Falls follows a shorter loop, with two parallel cascades spilling into a gorge thick with elkhorn ferns and king ferns whose trunks can reach four meters. Visitors walking the Natural Bridge circuit at dawn often encounter brush turkeys scratching through leaf litter, crimson rosellas in the midstory, and — on rare mornings — Albert's lyrebird, whose elaborate song mimics whipbirds, currawongs, and chainsaw engines with equal fidelity. The park's altitude, ranging from 600 to 1,100 meters, moderates the subtropical heat and sustains a canopy composition distinct from the lowland forests 30 kilometers east.