We will be on a Carnival Cruise and are trying to decide which Mayan ruins to visit. It is a 2.5 hrs bus ride to get to these ruins. We will stop at Progresso also.( 2 sites here: Chichen Itza and Dzibilchaltun Ruins). There are Mayan ruins there to see also. Would like to hear from anyone that has visited any or all of these Mayan Ruins and which ones they liked best. Just a total of 5 hrs on a bus is what worries me. Any help or input appreciated.