Jewel Cave features the longest straw of any tourist cave in the world, a huge area of flowstone that resembles a karri forest, and a stalagmite weighing some 20 tonnes.
Entry to Jewel Cave is through a huge, spectacular cavern. It boasts the longest straw of any tourist cave in the world, at just over 5.4 metres.
The cave was named after a smaller section known as the Jewel Casket and its crystal formations.
Guided tours of about one hour are available. Detailed information on tour times is available from the Augusta-Margaret River Tourism Association, phone (08) 9757 7411.