Unfortunately, Yes. The Colosseum is subject to unforeseen closures due to weather conditions and worker strikes, as well as last minute changes in reservations, all of which are out of Walks of Italy (or any other tour operator's) control. If for any reason we cannot run the tour as described, we will contact you immediately, offering the best alternatives. Depending on the situation this might result in a modification of the itinerary or a change in the tour start time. Our aim is to offer you the highest level of service and in the rare occasion in which circumstances outside of our control mean that you cannot participate in a variation of this tour we will offer you a full refund.