Do all the ruins, they are WELL worth it.
Tulum, Xcaret, etc...
Go to the underground caves - 'senotes' or 'ojos de agua' and pay the tour guide to give u the REAL tour, where u have to go underwater and shit.
TOP stuff.
Go to 'the City' at night. (club)
Go to the bar BEHIND the sports club, RIGHT next to the MALL, in FRONT of the police station...
Right on the beach, jacuzzi's on the sand, white flowing linens, around wooden posts, fucking KICK ass music... HOT chicks (argentina girls) wait on you. GOOD fun all the way around.
Swim with Dolphins.
Snorkel.
Scuba Dive if ya can.
That is enough for the whole time u are there. You'll have a blast
