Even before reaching the entrance of the tunnel, we could already see that there was a light that was coming from it.
It seemed faint when we weren't as close, but now that we were at the entrance, we could see that it was actually quite bright.
Though the brightness was only relative to the outside.
In the first place, the outside area was already quite dark because of cliff walls that were all around the place. They blocked off most of the natural light that would have come into this place, which was what made this place quite dark.
After adjusting to the change in brightness, I found that the light in this tunnel actually came from something quite interesting.
I wouldn't have noticed it since the light seemed like it came from all over the cave, but it wasn't hard to find the source when I looked closely.
I found that it was actually a group of fireflies that were on the roof that were providing this light.
