cozumel is soo easy to get around on your own in. taxi drivers are very friendly and farely cheap. i agree about going to the park, my sister did it on her own and said it was great. i choose to do tulum and then shopped around down town cozumel on my own while my husband was diving. i loved it and felt perfectly safe. we were there until 10pm so i was able to meet up with my husband and go back into downtown with him. we had a wonderful dinner in a streetside cafe. if you are into diving my husband said it was great. he dove with 'dive with martin' which only costed $60 (included equipement) for a 2 tank dive.