Blackheath, Australia
Mermaids Cave is an undercut sandstone cave located in the Blue Mountains of New South Wales, Australia. It was named in 1882 and was also known as Mermaid's Glen. It is accessible by a short walking trail from the Megalong Valley road. A scene from Mad Max Beyond Thunderdome was filmed there.
Listen to the audio guide for Mermaids Cave Free on WIP — starts by itself when you arrive, even with the screen off