The Huge Hidden Caves Beneath Australia’s Youngest Volcano

Discover the hidden cave systems beneath Mount Gambier, Australia’s youngest volcano. This underground network of limestone caves, sinkholes, and flooded tunnels reveals a geological story millions of years older than the volcano itself. Formed through karst processes in the ancient Gambier Limestone, these caves stretch beneath the town and continue to expand as new passages are discovered by cave divers. Explore how groundwater carved this subterranean landscape and how volcanic eruptions later reshaped the surface above it.