JDiver

I'd do a day outing to Cobá - You'll feel like Indiana Jones at this less crowded but very impressive archaeological site - with a stop at Tulúm on the way back to make some comparisons and take in the view.

Walking down the sacbé (ancient Maya roadway) to the 130 foot high Nohoc Mul pyramid sticking out of the jungle is very cool. At Tulúm you can see the "bee god" or "diving God", but it's perched on some cliffs over the Caribbean. Long day, nice things to see.

http://www.mexperience.com/guide/archaeology/coba.php

https://www.locogringo.com/mexico/wa...s/tulum-ruins/

Much closer to Cancún is El Meco Mayan archaeological site, across the channel from Isla Mujeres.

I also like Playa del Carmen (to stay in). Nearby denotes you can swim, snorkel or dive with proper guides, Yal Ku for snorkeling. Less jam packed touristy than Cancún, much better snorkeling. (Diving with gravity bull sharks at this time of rear, too, if you dive).

For a map and distance chart, see http://www.cancun-map.com/cancun/distances/

Try some authentic Yucatecan - Mayan food at Los Almendros.