In no particular order:
1. Take the ferry over to the mainland and tour Xcaret, Tulum, Chitzen Itza & other famous Mayan Cities like Coba (recommended). Your travel agent or Coz hotel arrange these, or you can do them on your own. BTW, if you decide to do Chitzen Itza, fly. The bus trip is a killer.
Also over on that side is the Crococun Zoological Park. I haven't done it, but it's been highly recommended to me by several people. It's just a bit north of Puerto Morelos, which is north of Playa del Carmen where to Coz passenger ferries dock. I'd guess it's about 20-30 min north on the highway to Cancun, on the right.
Or, just take the ferry over to Playa del Carmen, walk arond & have lunch at one of the many nice eatries. Ferries leave regularly from early AM to late PM, take about 1/2 hour & cost about $US17 r/t.
2. If you've got about $125 burning a hole in your pocket, play golf at the new Cozumel Country Club up north (shop around for a possible deal).
3. Or spend much less for Golfito where you can walkie-talkie for cold margaritas.
4. Anticlimatic for most divers, non-divers enjoy the Atlantis Submarine Tour.
5.There's some rather good deep sea fishing off Coz. Try Albatros. If you'd rather fish the lagoons or flats, contact me & I'll hook you up with a private guide.
6. Go parasailing. Serval places do this, and one is Fury Cats.
7. Like rodeos? Check out the Bull Riding Rodeo action across from Puerta Maya Pier.
8. Feel like shooting? Paint Ball Cozumel is ~1 mi south of International Pier. Not a great l0oking course, but okay.
9. See the wilds with Dune Buggy Tours (used to be Tarzan Tours). Office on 7th street, between 5th Ave & Melgar, but they'll pick you up at your hotel. I don't like these contraptions violating the east side, but you'll see parts of Coz you won't get to otherwise.
10. Horseback riding places that I know of include Los Laureles, Palmitas, San Miguel & Rancho Buenavista Ranches, all south of town. Likely there are others. Hotel can arrange.
11. IMHO, an often missed gem is the Museo de las Isla de Cozumel at Melgar between Calles 4 & 6N. Cool reef diaorama, very informative tours if the curator is around, and a terrace restaurant with nice water view & good breakfast.
12. Beto has reopened his go cart track further south of the old location. Heading south as you approach Puerta Maya it's on the left.
13. Cozumel Archaeological Park, about 10 min east of town on Cross Island Road (Av 65 S, I believe), near San Gervasio. See the ruins, both natural & reproductions, in the area. Conitnue on around to the east side and see the Castillo Real & Tumba El Caracol ruins.
14. Helicopter tours. Was Rio Blanco, but think it's Star something now. Anyway, pad is just south of the International Pier. Ask around.
15. I'm not into captive dolphins, but if you are down at Chankanaab Park is Dolphin Discovery. Also a small botanical garden.
16. If you personally are interested in diving caverns/caves on Coz proper, I can orient you to the locations & natures of several sites, but easiest is to go through Yucatech Expeditions. They can also hook you up with mainalnd cenote/cave diving, as can most Coz ops.
17. Haven't done this one, there's a small, uninhabited island in the far north called Isla de la Pasion. Supposedly has nice beach, but probably mobbed by cruisers. Need boat to get there--hotel can arrange.
18. Pay a visit (and make a donation) to one of the hyperbaric chambers that is open on a regular basis (one at the beach is not). I'd recommend the BMM facility over the one run by Dr. Piccolo. Can be informative & you'll have a good chance to see it operating. BMM is at Calle 5 Sur, #21-B, right next to the DAN Products shop.
19. Treat yourself to a message. There are a number of places to go, but great on the body & easy on the eyes is mi amiga, Helen Green. I also hear good things about Laura DiTuri (lauritad@hotmail.com) who'll come to your hotel.
20. Take a bike cruise. Can rent em at Aguilar Rentadora, just north of Calle 5 & Melgar, and at the No Name Bar (it's up for sale but hasn't been bought yet best as I know) right across the street from the International Pier. Stay off the main roads as much as possible. I can work out a route for you if you need one.
21. Squash can be had on Juarez & 75th Ave, left just before the "second" PEMEX station. Nice, new facility
22. Can never go wrong movies, and new 6-screen Cinepolis is right behind Chedraui shopping center.
23. If your group includes adult males looking for some raunchy doings, check out the Caribbean Queen (the raunchiest of the lot) on the Cross Island Road, or in town at Platino's (costly fun) or Negro & Blanco. Any cab driver will know where they are.
24. If you like disco/rock/raggae Las Boyas (Calle 3, between Avenida 15 & Ave 20), Neptuno's (Melgar & Calle 11Sur), Shake It (Salas & 10th Ave), Delfines (Salas diagonally across from Deep Blue) & Chicho's (upstairs on Ave 10 between Calles 7 & Calle 9) have some action. It think these address are correct & I assume that they all still open. I know most of them are.
25. For strains of Salsa to the aroma of Cuba cigars, it's the Havana Club (Melgar between Calles 6 & 8).
26. Later evening dancing is way cool at Cafe Salsa (10th Ave between Juarez & 2). Some very skilled moves here.
If you run out of things to do, feel free to e-mail me.
Helpful?
DocVikingo
