By a 2 day pass and get the 3rd day pass free. Take the complete tour first and decide where you would like to get off and explore some of the city. The buses run frequently so you will not wait more then 20-25 minutes for a bus. If you have your choice of drivers, I recommend TC as he is great with people. We call his tour the party bus as he will make sure you smile, laugh, and get off at the correct stop. Enjoy the ride, sit back, but if you sit on top, watch out for low flying branches, lol lol