I hope my question is OK for this section.
About 20 years ago, a Polish-Australian TV series Spellbinder was quite popular among many of us and our children. It's a science fiction children's series about travel to a parallel world. Many parts of it were filmed in & around Sydney, including the Blue Mountains and Camp Coutts.
An important location in Spellbinder is where the "doorway" to the parallel world could be opened. This location features:
- a tiny, hardly visible waterfall,
- a cave-like hole in a rock,
- and some rock engravings in the shape of straight parallel lines - I'm not sure if they were created by Aboriginal people or not.
![Smile :)](./images/smilies/icon_smile.gif)
Here are some TV screenshots:
![Image](https://iili.io/JR9AKWF.md.jpg)
![Image](https://iili.io/JR9ABfa.md.jpg)
![Image](https://iili.io/JR9AFx1.md.jpg)
![Image](https://iili.io/JR9A2DP.md.jpg)
![Image](https://iili.io/JR9AC0J.md.jpg)
![Image](https://iili.io/JR9AnUv.md.jpg)
![Image](https://iili.io/JR9AxJR.md.jpg)