description Stephenson Cave Overview
Stephenson Cave is a lava tube located in the Undara volcanic region of Queensland, Australia, recognized for its significant underground dimensions.
help Stephenson Cave FAQ
Where is Stephenson Cave located?
Stephenson Cave is part of the Undara lava-tube system in Queensland, Australia. The system formed from an eruption of Undara Volcano about 190,000 years ago, when lava flowed beneath a cooling crust. [Queensland Parks](https://parks.qld.gov.au/parks/undara-volcanic/things-to-do)
How large is Stephenson Cave?
A published survey table lists about 156 metres of length, with estimated maximum width over 25 metres and height over 10 metres. Those width and height values are estimates, so they should not be presented as a precise modern survey. [Survey paper](https://digitalcommons.usf.edu/kip_articles/6174/)
Can visitors enter Stephenson Cave without a guide?
Queensland Parks says access to the Undara lava tubes is by guided tour only. Tour operators such as Discovery Resorts Undara and Undara Lava Tube Tours handle the visitor experience, rather than visitors entering the tubes freely. [Queensland Parks](https://parks.qld.gov.au/parks/undara-volcanic/things-to-do)
Why are the Undara lava tubes ecologically important?
The caves provide roosting habitat for thousands of insectivorous bats, and predators such as spotted pythons wait near entrances for bats to emerge. That wildlife is one reason access is managed through guided tours. [Queensland Parks](https://parks.qld.gov.au/parks/undara-volcanic/things-to-do)
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