While arriving more than 15-minutes late does not mean we will cancel your entire visit, but we will have to make alterations. Our presentations and tours will start promptly as scheduled. Our large group visits are open to more than one group per day/time slot. If you are not on time for any part of your visit, we will have to begin without your group. If you are more than 15 minutes late for the tour portion of your visit, we will have to cancel your tour. Our tour guides are students, and we can only keep them for 15-minutes past the scheduled start time.