However, if you haven't yet planned out your vacation for this year yet, you'll definitely want to leave a few places off the list of possible destinations.
The U.S. Department of State has advised against visiting 19 specific destinations. They've issued a Level 4 advisory, which is the most serious warning they can give.
Gambling normally only takes place while the ship is in international waters, cruise lines that sail from U.S. ports also adhere to the rules set out by the Cruise Lines International Association.