I've been to Cancun a few times and with it's proximity to the US, it's a great “International” destination for even just a few days of fun in the sun! Here is what I would recommend checking out while in town
Taco tour in Mexico??? Yes please!!
Cancun Taco Tour, Local Beer and Night Market with Transportation
Chichen Itza is a MUST visit - here are some options
Chichen Itza, Cenote, and Valladolid Tour with 3 Options - Viator
If adventure travel is your thing, this ATV and zip-lining tour is for you! Plus it ends with some tequila tasting!
Cancun ATV Jungle Adventure, Ziplines, Cenote and Tequila Tasting
A sail on the clear water is a must do while in Mexico and this option includes lunch and an open bar
Isla Mujeres Luxury Catamaran Sailing plus Lunch and Open Bar
With Tulum so close, this is a great day trip option that includes snokeling
Viator Exclusive: Tulum Ruins, Reef Snorkeling, Cenote and Caves
Nothing goes better than a boat party with good tunes! This Adults Only option is a great option for an afternoon of fun
Adults only Hip Hop Sessions Boat Party Cancun - Viator
Another great day trip, escape for the day to Xcaret, Mexico's ecological and archeology park located in Riviera Maya.
Xcaret Park Day Trip, transportation and Cultural Night Show - Viator
Another one for the adventure lovers but this day trip includes horse back riding as well as a tequila tasting!
ATV Ziplines, Cenote, Lunch, Horseback Riding and Tequila Tasting
This is a great all day option to check out Tulum to it's fullest including lunch and snokeling with sea turtles
Tulum, Snorkeling with Sea Turtles, Cenote and Beachside Lunch
A great option if you are traveling with the family, Xplor Adventure Park is where to go!
Xplor Park Day Trip with Lunch and Transportation - Viator
See incredible panoramic views of Cancun and Isla Mujeres and you will be amazed by the spectacular views of the Caribbean Sea on this excusion
Isla Mujeres Catamaran, Open Bar & Optional Buffet and pick up
I've see the Cirque shows in many different cities and they never disappoint!
Cirque du Soleil JOYA Admission Tickets - Cancun - Viator
Great seafood and stellar location - make sure you grab a reservation at sunset to make the most of the evening!
Navíos
If you are looking for a proper steakhouse to celebrate any occasion, here is where you will want to go. Harry's in Cancun is often celebrated for its breathtaking ocean views and elegant atmosphere, with many guests particularly enamored by the stunning sunsets.
Harry's Steakhouse & Raw Bar | Cancun
If you are looking for traditional Mexican tacos, you will want to head here. The live music is also highlighted by many of the rave reviews of this traditional taqueria.