Was drawn to the company because they are "eco" and the San Andreas fault. You are skirred around in fun little red jeeps in groups of 6-7. Each group has it's own guide which makes for both a personal and intimate experience. We traveled with Carlos who enthusiastically answered all of our questions so throughly the tour ran over it's alloted time. He provided the children in the group a bonus experience by guiding them on a rock wall climb (with parental permission of course). There is much to learn about geology and native American culture. We walked away from the tour smarter and feeling like we had made a friend. Thanks Carlos.