This is a vent with hot air escaping from the volcano. I can't remember how hot our guide said it was but many many times higher than boiling point. He said under no condition put hands or feet beyond the bars. Of course someone had to try it and it peeled the skin right off his hand. His guide rushed him off to hospital but I don't know what happened because he wasn't from our group.
I am joining Sandee at Comedy Plus for the blog hop.
