We enjoyed our e-bike tour of the facility. This is the most in-depth tour they currently offer. It was historically interesting and informative as well as sharing some of the modern uses of this remarkable space. I don't have any specific criticism of the experience. It was fun. I think the cost was realistic for the time that we spent. I'm not sure I would come back to do it again, so I guess that's my only question is what else is Mega Cavern going to use to attract visitors back? Zip lines - maybe for some but not all and very pricey? Probably not for me. Bicycle course - maybe the mountain bike style. Some of my other ideas: bowling alley, underground mini-golf, go-karts, museum, musical performances, IMAX theater.