Since all the tours are surprise tours they cannot divulge the stops so you must meet the tour at the starting point. After you purchase your tickets you will receive a detailed confirmation with very specific meeting point information. Carry the confirmation with you and they will be at the meeting point by the start time.
They urge you to be at the location 15 minutes before the start of the tour.
If you are lost they provide simple IF YOU ARE LOST instructions. Please use these instructions right away if you are lost. Meeting point information is also available on their main phone line by pressing #3. Live operators are not available to help you so please have all the necessary information with you.