Not flaming at all, adding information, which is great.
Years ago I went to the Te Anau Caves, South Island, NZ. Travelled across Lake Te Anau by boat then entered the cave in almost total darkness walked thru the cave system on constructed paths. Boarded some small boats which were paddled further into the caves. The small lights were then turned out and the whole place lit up with the roof of the cave covered in Glowworms.
see
https://www.newzealand.com/au/plan/b...real-journeys/
This photo does not do the place justice, it is truly marvelous. My 4 year-old son (at the time, he's almost 53 now) called out,
to the amusement of all present, the is the most amazing thing I've seen in my whole life.