Best things to do here are: parasailing, strolling along one of the most gorgeous, blindingly white, baby power consistency beaches in the world, swimming or snorkeling in some of the most beautiful, high visibility oceans you will ever encounter, a day trip to Cozumel, Playa Del Carmen, ruins at Tulum, shopping downtown, experiencing one of the many enticing restaurants and bars, wet biking, banana-boat riding, beach volleyball, water volleyball, and more.
One of the most memorable moments I had here was when I parasailed off the beach behind the Oasis Cancun hotel (not off the rear of a boat). It requires a bit of skill and agility; it was my first time. My run off the beach with the parasail opening went without incident and the ride/view from above was incredible. The only sound I could hear when up in the skies was the sound of strong winds whistling past my ears. I was so high up in the air that the hotels appeared to be ant-sized. However, it's a very peaceful, yet an overall exhilarating experience.
The most difficult part of off-the-beach parasailing is that you must use the ropes connected to the parasail (just above your head) to position yourself for landing. At the sound of a parasail employee blowing a whistle, you must pull down hard on one of the ropes (marked by a black piece of tape) to position properly for landing on the beach. The whistle is blown again to indicate that you are correctly positioned for landing and should release the rope. If the timing is wrong, or you hold the rope down too long, you might find yourself slamming into the side of one of the hotels or into a volleyball net on the beach.
The winds were high that day and I didn't hear the second whistle blow. Finally, I hear a group of parasail employees and my husband yelling something; realizing that it was time to stop pulling on the positioning rope. I ended up making a perfect landing (by accident I'm sure) and had three of the Mexican employees standing on the beach to catch me (see pic below).
Quick Tips:
Best place to rent a parasail is on the beach, directly behind the Oasis Cancun.
If you choose to take a cab, negotiate the price of the fare before entering the cab. Otherwise, cab drivers WILL take advantage of you.
Brush up on conversational Spanish; it will pay off.
Check exchange rates; dont exchange money at your hotel as you will get more for your money elsewhere (downtown banks often have higher exchange rate).
Cancun is crawling with timeshare sharks. Say no and keep walking.
Best Way To Get Around:
You will probably be staying in one of the hotels in the hotel zone, so I recommend hopping in a public bus for about .60. Buses run constantly throughout the day and you will never have to wait too long for one. They stop just outside all the hotels in the hotel zone. Renting a car here is not recommended because the numerous taxi cab drivers drive wildly and speed limits are not enforced.