Mercer
Here is the inside of Mercer Caverns. Without lighting there is complete darkness. Initially Madeleine wants nothing to do with the caves remember Wales but she joins in the end. The children as all sorts of interesting questions: "where do the rocks come from?" (Madeleine); "Why does that look like chocolate?" (Maya); "Is there any gold?" (Devon); "Is there any gold pylate? (Devon) This last question flummoxes our otherwise informed guide. From there we descend 208 steps - despite this depth it is not the bottom, where a breeze enters the caves providing oxygen and cool air. While there is general curiosity where the air source originates, it against California law to dig or damage the pristine below for discovery. Various methods BTW were used including blue smoke which, it was believed, would exit somewhere outside Mercer and provide the source. Fat chance, as the current kept the smoke inside and smoked everybody else out. Eitan BTW reports that there are only 192 steps to the bottom and if there was a bet I would put it with him.