Sena website doesn't allow you to purchase bus tickets online using credit card unless your Nationality is from one of the European nations. It does give you an option to purchase and then pick up your tickets from a Sisal location. Can someone please provide a little more information on this process and where you could find a convenient Sisal location at or near the Rome airport or the bus terminal? Trying to get from Rome to Siena in October. Thanks in advance.