Before going to Cancun, one of my friends told me to avoid going on group snorkeling tours. You wade out into the lagoon in a long line and then all you can see is other people. For this reason, I did not go on one of these tours and can't vouch for its veracity, but it sure sounded like a ripoff.
Unique Suggestions: If you really want to go snorkeling though, go somewhere a little further away from all the hotels if you can. This would probably be pretty hard to do.
When laying on the beach, someone will come up to you selling some type of adventure tour. Beware of the stuff that they promise you like food, drinks, and whatever else. Those guys are usually independant of the tour company and say anything for you to buy. Once you pay him, it'll be hard to find him again.
Unique Suggestions: Best bet is to go to the tour operators directly and see what they offer. Confirm that the items they promise you will in fact be honoured.
Well, the whole of Cancún is a tourist trap, isn't it?
But if you were in Xcaret (one hour to the south) a few years ago and liked it, you'll be very disappointed this time: it has been 'discovered' by mass-tourism and it's one hundred times more crowded now than it was in '95. Besides, the entrance fee is outrageous (US$45).
Parrots at Xel-Ha ecological waterworld.Do check this great web site out on Cancun and its live web-cam of the beach...........http://www.allaboutcancun.com/'
Xal-Ha is a national park 73 miles from Cancun.It has caves,inlets and lagoons.Fish from the Caribbean sea come here to shelter from the rough waters.I enjoyed it here.I snorkeled and watched a dolphin show and there were lots of places to sun bathe.