In Japan the whole neighbourhood gets together for the local Shrine's festival of taking the Kami-sama out and around. This is one of the side events, children put their heads in the Dragon's mouth for good luck.
Isn't this gorgeous! Actually had a little dip in it, probably not a good idea as it is a dormant volcano, verging on active apparently. As we trod in gas bubbles were bobbing up to the surface. After a deep breathing exercise the next day I could still taste the sulfur. Won't do it again, but had wanted to for so long, I can finally cross it off my list.