The Massive Australian Cave System You Never Hear About

The Massive Australian Cave System You Never Hear About

Hidden beneath the remote landscapes of the Northern Territory lies Bullita Cave, Australia’s longest and least-known cave system. This enormous 123-kilometre underground labyrinth stretches through ancient Proterozoic dolostone in the Judbarra and Gregory Karst region. Its maze-like passages, shallow depth and astonishing density make it one of the most unusual cave networks on Earth. Bullita formed through the combined power of monsoonal flooding, rapid vertical infiltration and the erosion of a critical shale layer, producing a sprawling subterranean world that most people have never even heard of. This article explores the geology, hydrology and evolutionary history of Australia’s largest cave system and reveals why this hidden underworld is unlike anything else in the country.

Burning Mountain: Australia’s Eternal Fire Beneath the Earth

Burning Mountain: Australia’s Eternal Fire Beneath the Earth

Deep beneath the hills of New South Wales, Burning Mountain holds a fiery secret: it's the site of the world’s longest-burning underground coal seam fire, estimated to have been smouldering for over 6,000 years. Located near the town of Wingen, this slow-moving subterranean fire has transformed the landscape, warping the ground and emitting heat and smoke through surface vents. Once mistaken for a volcanic phenomenon, Burning Mountain is a remarkable example of how natural coal deposits can ignite and burn for millennia—without any human intervention. This blog explores the geologic origins, current movement, and global significance of one of Earth's most quietly dramatic natural features.

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