See the best of san antonio at your own pace with this 2 day pass to both a hop on hop off trolley and double decker bus visit top san antonio attractions including the alamo san fernando cathedral and mission concepcion upgrade to also get admission to the tower of the americas observation deck and 4d theater ride enjoy unlimited use of both the trolley and double decker bus for two days to get around this historic texas city and explore its best sights at your leisure