Travelling to Cuba?
It's been made a lot easier in the past few months, but it's still not like driving across the border at Niagara Falls to drive around Canada at your leisure.
Here's a couple of sites to help you sort it out.

NYT  http://www.nytimes.com/2015/09/21/travel/cuba-vacations.html?_r=0

CNN  http://www.cnn.com/2015/12/18/travel/cuba-travel-rules-explained/