Hi, for COSTA MAYA I may recommend for example the SNUBA diving beach break (various water tours visit this rather secluded beach and bar with snack available), no diving experience required it is a mix between diving and snorkeling without equippment. Then the ATV eco excursion is a good choice as well, a great landscape mixed with action adventure....jungle horseback riding is nice as well..the bike and kayak tour also a nice combination. Sightseeing....Chacchoben and Kohunlich are certainly very impressive sites to be seen...choice is yours. Saludos from Cozumel!