Took the family for a one day trip getaway and this was perfect! My kids had never been to a cave before so this was their first experience. Was able to order my tickets online ahead of time and when we arrived we were doing our first tour within 30 minutes. We did the combo package of both caves...it was a good idea because you see such different things between the two. Our guides were great and provided lots of terrific information about how the caves were formed and the whole history of their discovery. Family had a great time and it will be something we will suggest to others to do. Only thing I would suggest for the managers of Marengo Cave...the "Snack Shop" sign should really say "Vending Area" as we were really hungry between our tours and thought we would go grab a quick bite only to find two vending machines and an area to sit down. :-) Overall great experience though!