As we went further into the massive passage that is Deer Cave, I turned around and got this shot back to the entrance.
The tectonic shifting of the ground has moved this passage out of the way of the main water ways. The volumes of water that would have passed through here at one time now take other routes through the mountains but it's still wet inside the cave.
water constantly leaks through the ceiling as the moisture from the rainforest soils covering these mountains seeps down through fissures in the rocks to drip, drip, drip into the cave. Add the natural tropical humidity and the environment is dank. Add the millions of bats and the environment is also stinks!
At the light faded behind us, it had already disappeared in front of us and we were using flashlights to light our way along the paths and stairs and stairs of this show cave. I believe Deer Cave and the other show caves now have lighting installed, which is good in one way and bad in another.