recommended viewing
David Gilmour - Blue Light
https://www.youtube.com/watch?v=BS61CyzFlxQ
The “famous” Film director from the first wave of German Expressionism. She lived until age 101.
I recall seeing a photo of Leni and Mick Jagger diving off a high rugged cliff into the ocean.
https://www.amazon.com/House-Blue-Light-Deep-Purple/dp/B00000JBFX
There seems to be another story with the same title.
This one with the crystal grotto sounds good.