Jewel Caves Road, Deepdene, Western Australia, 6290
Fully-guided | 1 hour tour | Bookings essential
The size and beauty of Jewel Cave in Augusta is simply breathtaking. Marvel at sparkling cave decorations as you adventure through three immense chambers with a friendly tour guide.
Join a fully guided one-hour tour through Jewel Cave’s vast chambers, where your guide will reveal the scale, beauty, and science behind this remarkable underground world. Your expert guide brings the cave to life, highlighting delicate crystal formations including stalactites, stalagmites, straws, and shawls.
Along the way, you’ll learn how limestone caves are created, and listen to a remarkable story of discovery – one that involves finding fossil remains of Tasmanian Tigers, offering a rare glimpse into the Margaret River Region’s ancient past.
Each of the Margaret River Region’s show caves offers something different. Jewel Cave is the largest cave open to visitors in Western Australia – it is full of huge and unique cave decorations, including one of the longest cave straws in Australia!
Your experience also includes access to an optional self-guided walk through the surrounding karri forest, where towering trees and native bushland provide a peaceful contrast to the underground landscape.
Our Jewel Cave and Lake Cave experiences are fully guided. A visit to Ngilgi Cave is self-guided, and Mammoth Cave is audio-guided.
Stalagmites, stalactites, underground streams and sunken forests, some of the Margaret River Region’s most compelling landscapes, lie just beneath the surface.
Explore our cave guide to discover which underground experience is right for you.
Jewel Cave is located within the Leeuwin-Naturaliste Ridge, a limestone formation approximately 90 kilometres long and 3 kilometres wide.
Formed over the past million years, the ridge is made primarily of Aeolian calcarenite—a type of limestone that began as coastal sand dunes, seashells, and coral, blown inland by strong westerly winds and gradually cemented by rainwater. Today, this landscape of limestone has been shaped by water and time into dramatic ridges, cliffs, and the caves we explore.
Inside the caves, you’ll find intricate natural features known as speleothems (pronounced spe-leo-thems). These formations include straws, stalactites, stalagmites, columns, shawls, helictites, and flowstone. All speleothems are made from calcite, a crystalline form of calcium carbonate.
As rainwater seeps through the limestone, it dissolves small amounts of calcium carbonate. When this mineral-rich water enters a cave, it begins to deposit calcite crystals, slowly building the stunning decorations that line the cave walls and ceilings today.