My partner and I will be coming to Cancun for this first time in a month! We are trying to decide what excursions to do and where to buy the excursions. She is forsure going to do the Boobs Cruise. She is beautiful with an amazing body where I am not. She will be going on that alone. I would like to do an adventurous excursions such as Zip Lining or ATV's. I would also like to do a horseback ride. Maybe a swim with the dolphins. We are there for 5 nights. I do not want to sit at the resort all day. All ideas are very appreciated and also where I can book the excursions and get the best deal. Should I book in advance or at the resort? Thanks!