Do I Have to Pay a Cuba Departure Tax?
There technically is a departure tax of 25 USD when you leave Cuba, but as of May 2015 that fee is now collected as part of your airfare. You do not have to pay a separate departure tax when you leave Cuba.

It's more than just having a good time or visiting beautiful places (although that's absolutely a part of it!), it's about being part of a unique experience that stays with you.