We bought waterbottles at the bottom of the mountain and when mostly full, these steel bottles make a weird noise. In the cave, behind one's ear, it sounds like a bat. The guide was giving a tour and my boyfriend took a drink behind me. I gasped loudly and ducked--last thing I wanted was a bat in my hair. No one else moved, and I looked behind me to see my boyfriend giving me this perplexed look and lowering his drink. Yeah, kinda embarrassing.
I don't have any pictures from inside the cave, but later we went further up the canyon to see this idyllic spot, so enjoy the picture spam: