I saw plants growing in the cave. The fruit bats feces is the source of the plants. I am a big animal lover but have never been a fan of Bats. I heard so many of them it was kind of freaking me out. My DH and I had visited a cave in TN and he got claustrophobic so I was really surprised when I saw him almost crawling through some of the tunnels in this one. Mr. T had to call him out of the tunnels a few times. I guess this trip cured him of cave phobia.