If you crave adventure - an off-the-beaten-path way to explore California - the answer is right in front of you. 'California Underground Adventures' is an informative and entertaining guide to the state's best caves, mines and lava tubes. It includes complete site information, as well as details about each site's history and geology. Plus, the authors' tongue-in-cheek notes make this guidebook almost as fun to read as the caves are to explore!.